Abby
Welcome to the wonderful world of MG. That is one of the most frustrating aspects of this disease.... the unpredictability of it. You will figure out what affects your MG as you learn to live with this disease. Yes, you will find out your MG triggers too. There will also be times when you really don't know what causes you to have a bad day. Doing too much can sometimes catch up to you when you least expect it to and when you don't even realize it.
Jana mentioned quite a few things that affect all of us MGers so I'm not really going to add to the list. Just try not to add additional stress to yourself by trying to figure out what you did to cause your bad day. Sometimes you just have them. What you should do is continue to take your medication, rest as much as possible and know that the bad day won't last forever. Your good day is right around the corner
Of course, if you start going downhill and not getting any better then you should contact your doctor.
I'll keep you in my thoughts and prayers,
Shari