HELP

Hi, I am very scared after reading posts and diagnosing myself through Google.. I have two pea sized lumps under my skin (one is smaller that that) on front of my upper leg about right in the middle. You can't see the lumps but feel them when i rub into my leg. I have a derm appt tomorrow but when I google this is comes up sarcoma and I was just wondering how you knew or what triggered you to go and if this sypmtom sounds familiar?

Thank you