Hi, Welcome. Bruegger, do you have a more informal name?
What kind of reaction do you get with aspirin?
I'm a bit worried about possible drug interactions or contraindications given the list of drugs you're on. Some drugs are not good to take if you have MG. Here's a website for you:
www.myasthenia.org At least check with your pharmacy to make sure. Some drugs can make MG worse.
An EMG is not enough evidence to "prove" you have MG. I hope they have done both the Acetylcholine Receptor Antibody (3-part test includes binding, blocking and modulating antibodies) and the MuSK Antibody tests.
Are you having the muscle biopsy done at a "large" medical institution? If not, the results may not be as accurate. They can't always "see" the neuromuscular junction.
It's a big learning curve having MG. I hope you will get a more definitive diagnosis and then learn as much as you can.
Annie