Caffene symptoms and conditions

I am 28 and have lupus, I was put on 10 mg of methotrexate last week weekly. Im expierencing some really weird side effects, atleast I think there side effects. My lower abdomen became very sensitive, I couldnt even touch the area where my uterus is, and now my breast have enlarged by a whole cup size and become very, VERY sore. Like the sore you get when you first get pregnant but I had a tubal ligation 6 years ago so pregnancy is out of the question. My heart beat is irregular and caffene seems to realy make it worse. I am soooo tired too, omg. I can't believe how tired I have become. And my hair is falling out, every time I shower it falls out in handfulls. Has anyone else experienced any of these symptoms? If so please share!

I started taking it (50mg) about a 6 weeks ago for an irregular heart beat. I'm also on Vitorin and Lisinopryl (high cholesterol and high blood pressure). I'm pretty sure the IHB and blood pressure issues stemmed from too much caffene intake. I've since stopped that, but now I feel tired a lot (fall asleep almost any time I find a couch or comfortable chair), not as interested in sex (could be other reasons for that) and slow weight gain (about 5 lbs so far, but I've been working to loose weight, not gain). I plan to speak with the doctor and see if I can be taken off now that I've stopped the caffene.