Kendra, I'm glad you are getting some answers. So many things can cause a high platelet count. Mine has been high a couple of times. Has your doctor thought about ITP (idiopathic thrombocytopenic purpura)?
http://emedicine.medscape.com/article/779545-overview
I have known people who have that and have a family history of it and other autoimmune diseases, like lupus.
It's great that you figured out what that drug was all about. I hope things get better off of that drug. It can take MONTHS to see the effects of a drug wear off. The body needs time to adjust.
I hope you are doing some fun things to keep your mind off of it all in the meantime.
Annie