Today the itching has been so bad that I decided I can't possibly go on as is. I didn't have a rash for all the months I was on 200 mg of carbamazepine, but I developed one within 6 weeks of increasing the dose. (The usual timescale for such things is 3-8 weeks.) What I wanted to do was keep going at 300 mg and see if the rash went away, but I just can't stand it, and it's too long until the blood test results will be back on Thursday or Friday. I really can't express what it's like to itch, itch, itch the whole time so that concentrating on anything becomes almost impossible.
So today I only took 200 mg. I figured that I'd have a couple of days of relative sanity before severe SAD and inability to use brain came back, which would be enough time for the purpose. I totally forgot about my menstrual cycle. Which would be why I've spent the past couple of hours sitting here reading fanfic on the internet and crying my eyes out.