hey, Nickie, I totally understand that, too. It's like, if people would just leave you alone, you would be perfect! You haven't messed up yet, have you? Just scared you will?
You know darn well you're good! Better than good! Sometimes, I know it sounds stupid, but sometimes if you breathe deeply in and out, concentrate on your breathing and run it over in your head right before the "test", it will calm you. Or, for sure, you can take some Klonopin, as long as that doesn't interfere with your thinking. Probably a combo of the two would be even better! (Better living through modern day chemistry, lol).
At least you know when it's coming, you can get a jump on it. I wish I could help you more, but there's only so much. I hate that!
You do need to figure out the delegating! Does Jason help out? He needs to, and he should! Your sleep is way important, you know that, if you don't get it you won't be doing well the next day and your moods will be all over the place. Have a talk, for what good it'll do lol with Jason and tell him why you need his help.
Mostly, don't start doubting your abilities, that's all you need! You are better than most, I bet, not just saying that but we do tend to overachieve!
Variety is the spice of life, BP is the key