Well, you can have positive antibodies while having a thymoma in your body. Have they retested since they took out the thymoma?
You're not crazy. Whenever you have symptoms that can't be fully explained by one disease, you have to look at other causes. Simple science!
I can't find the articles I want! They are in PubMed and they talk about patients who have had a thymoma, have positive AChR antibodies, they take the thymoma out and then the antibodies (and disease state) are gone.
Here are some others which may be of interest.
http://www.ncbi.nlm.nih.gov/pubmed/19562765
http://www.ncbi.nlm.nih.gov/pubmed/15534101
And to confuse you even more:
http://www.ncbi.nlm.nih.gov/pubmed/18657424
And just because it's way too funny:
http://www.ncbi.nlm.nih.gov/pubmed/15526902
Maybe you simply have MG bad. When I had my crisis, my hands contorted for a couple weeks after any time I tried to hold something for like seconds.
Annie