What Causes Myofascial Pain After Treated Cervical Cancer?

I had cervical cancer and had a radical hysterectomy 11/26/12. I ve had thigh weakness since then which I believe is from the extensive lymph node harvesting. There has been no recurrence thank God, but my thigh weakness is getting worse. I also started to have pettechiae on my forearms and sometimes small hunks of tissue will be missing on my hands or arms like some of my 80 year old patients. I saw a hematologist who couldn t find anything wrong, but it s getting worse . My coordination and balance are getting worse as well as my thigh weakness and I fell down the stairs this morning and a hunk of my calf opened up and I needed stitches . They checked my orthos, liver function, B12, thyroid, etc. I am seeing my MD this week. I have bipolar disease and they just started me on lithium last week and this has definitely contributed to the problem. I also have GERD, hiatal Hinayana, asthma, myofascial pain, venous stasis d/t I used to weigh 322lbs. I lost 175lbs 6 years ago from joining food addicts and eat 3 weighed and measured meals/day and avoiding flour and sugar. Can you give any suggestions of what could be wrong?