I've been feeling better. I've been going outside! Of my house! Also, after doing no exercise at all since starting stims in February, I'm finally back on the treadmill. I've only been walking (slowly, and only for 30 minutes at a time) and thinking about increasing because all seemed to be going so well.
Last night I had some lower back pain (exactly like how it felt just before a period) and it freaked me out. Up until now I've had an assortment of aches and pains, but none that have struck me as possibly abnormal. I thought I was all confident and secure and all that, but last night my paranoia and worry came back all over again. After sleeping, I feel somewhat better (much less woried.)
Today I'm resting.