I haven't had any allergic reactions to antibiotics but I have had very negative reactions in regards to breathing and chest pressure. The only antibiotic I can tolerate is Bactrum.

However in regards to what your describing...I agree you should get to the hospital. I have learned very quickly that if you are experiencing funky or exacerbated symptoms, the best option is to go to the ER and/or get a hold of your Neurologist asap because symptoms can go from bad to scary quickly with MG.

I hope you feel better soon