As some of you know, I don't have a firm diagnosis, but seronegative MG is high on the list.... I had a question

I am getting over the flu, and just needed a little relief from the congestion, So I took a benadryl... I of course was sleepy, but i got funky vision and looked in the mirror and it looked like my face was hot wax that had melted off. it was quite horrific looking!!! I woke up this morning and look back to myself again.. Is this something that is typical in MG, for benadryl to affect me that way??