@worriedgirl35 I'd like to reassure you that you are doing everything you can to figure this out. It is frightening to find these lumps and changes and if you are like me you searched the Internet to try and figure out what this might be. I like to know everything I can find but I also realize that sometimes these Internet searches bring up even more worry and anxiety. I had some moments yesterday of anxiety (a common occurrence for me) and I told myself that at that moment I was where I needed to be. The best thing for me to do was to go forward with my life and my plans for the day and let the anxiety just be there. A few breaths, looking around the room, widening my view to get outside of myself and then the anxiety abated.

You wrote here your symptoms, when you first noticed the bump, and how it feels to touch as well as to sit on and to sleep. All good information for your doctor. Making an appointment with your PCP is the best step to figure this out. It's very possible that this is not malignant although I very much understand your worry. Even if your PCP tries to assure you that this "nothing to be concerned about" you can ask for a referral to a surgeon to have the lump removed as it is painful and affecting your life, especially your sleep. The lump will be sent to pathology for a diagnosis and then you will know for sure what this is.

I had a lump (not painful) that was at the junction of the top of my hip and lower abdomen. It became uncomfortable because it rubbed against my underwear. A surgeon removed the lump, sent it to pathology, and it was a benign lipoma. The surgeon told me that this location is a common place to get these common fatty lumps. It's now 16 years after that lipoma was removed and a smaller lipoma is back in the same place. Since at this point it doesn't bother me I have left it alone and mention it to my PCP during my annual exams.

What day will your see your PCP? Will you come back here and let me know what your doctor says and what the plans are?