EARLY SYMPTONS.....CAN U HELP!!!

Hello, I was hoping that you all could give me some insight on the early signs of uterine cancer. I am almost 29 yrs old and started to have abnormal periods back in Jan. with practically either spotting or bleeding almost every day. I was quick to blame it on the IUD that I had placed last summer, so I took a trip to the OB/GYN and he put me on some estrogen the end of Feb to see if that would work. I am so busy with my career that I have a hard time going to the doctor, so I finally made myself go back last week after only really "not-bleeding" for about a 2 week span since Jan. I had a sonogram done on last Thursday and they found what they believe to be a polyp, which could be the cause of the bleeding. I was told not to worry because these polyps are common in women and most of the time are non-cancerous. I will be having a office procedure done on Monday to attempt to remove this polyp in my uterus. If that does not work, then a D & C will have to be done. I can do nothing but worry that something else might be wrong and I do not know if I am just being a "worry wart"-:) I read some previous post from individuals that they had leg pain and I do have stiffness and joint pain in my legs recently that I could figure out, along with various other symptons people have described. Can anyone tell me what their early signs were? Thank you very much!!