Antibiotics gave me seborrheic.

I came down with strep throat about three weeks ago and ended up getting the Antibiotic called amoxicillin. I took it for 3 days and got a rash the following day.The rash didnt bother me cause I just thought it was a side effect. After the rash went away I started getting patches of dry skin and flaky eye brows right away. I went to the dermatologist and he said it was Seborrheic Dermatitis .But that wasnt the only symptom I got. I started getting fungus on my toe as well as heartburn, nausea, and a metallic taste in my mouth when I would eat. Im just really confused on what has happened and need help. After doing research I believe it has something to do with my gut. Tweet