Lots of Symptoms Yet No Answers

First off, I have not been diagnosed with any form of cancer or anything to be quite honest but my symptoms seem to point in the direction of some form lymphoma. I have been to see my regular doctor who sends me to specialists who perform countless tests over the last 3 years with small abnormalities but not enough to cause them alarm.

The first thing that caused me to see my doctor 3 years ago was an odd lump that I felt just above my left breast. I was sent for an ultrasound and told that it was a swollen lymph node and I should return if it does not go away. It has not gone away. The next thing that sent me to my doctor was that I had a difficult time breathing. I felt like I had an elephant sitting on my chest and I was tired all the time. I thought maybe I developed asthma like most of my family. An Xray showed "something" and I was sent to get a CT scan which showed nothing to be alarmed of. My doctor noticed swollen lymph nodes on the left side of my neck that I hadnt noticed and he sent me to an ENT. The ENT looked at my thyroid and declared that I had a nodule in the right side of my thyroid and found more swollen lymph nodes. He checked the size of the thyroid nodule and said that it didn't look too scary so I was told to come back if the lymph nodes have not returned to normal size. I began to sweat so much at random times during the day even when I was shivering from the cold. I developed heart PVC's 1 year ago which caused me to be taken by EMT's to the hospital from work where it was declared that my heart kept trying to create an extra beat causing my heart to feel as though it was being thrown against the inside of my ribcage which took my breath away. I was sent for stress tests, an EKG and more chest scans but no definate cause could be found. I got tired of dealing with all of the symptoms that the doctors could see but not explain so I stopped going to the doctor. I started having some extreme pain under my left shoulder blade into my shoulder joint that extended to my clavicle and into my chest all on the left side. I thought that I had just slept wrong or pulled a muscle so I tried to deal with the pain. I went to my chiropractor who was shocked to find that my clavicle had been displaced without any known injury. He noticed that I have swelling that extends from my underarm to above my clavicle bone. He said that the swelling is what caused my bone to be displaced. He set it back into place and I thought that would have remedied the pain. It did not. A few weeks ago I got very very ill after my four kids came down with a 48 hour cold. I thought I had gotten the same virus and expected to be well and ready to return to work after 48 hours. After 2 weeks of drenching sweats at all hours of the day, sleeping almost constantly and chills I went to the doctor. After many blood tests it was established that I had contracted mono, which was odd since I had not swapped saliva with anyone in the last 6 months other than my kids sneaking sips of my soda. He told me that he thinks that there is something else going on and that is why the mono set in so intensly so quickly. I was put on a 6 day steroid routine which had helped me be more productive as a single parent, relieved some of the fatigue of the mono and shrunk some of the swelling in the left side of my neck. A few hours after the last dose of steroids, the pressure and uncomfortable pain in my left shoulder blade, clavicle and neck has returned. In the course of 3 years the lymph nodes continue to get bigger and cause more pressure in my neck. After each visit to my doctor and specialists, I leave feeling like they are missing something and that something is wrong. I don't know what or how serious but I know something is causing this.

I suppose the biggest question in my mind is whether or not I am crazy and overthinking all of this. The symptoms are tolerable but are getting unbearably annoying. I would just like answers so I can learn to adapt and deal with it. The word 'lymphoma' keeps coming to mind no matter how many times I push it out. Am I asking the wrong questions that are keeping the doctors from figuring out what is wrong?