I’ve just been diagnosed with strep throat and i have Phenoxymethylpenicillin as my antibiotic. But i seem to have noticed i have a sore green patch on the top of my mouth, the same colour as an ulcer but i cannot eat food because my gums are all swollen and sore. I’ve been trying to drink meal drinks for the past 5 days, but where all my gum around my wisdom tooth is swollen it is KILLING. DOES ANYONE KNOW WHAT THIS IS???? THE GREEN PATCH AND BAD GUM SWELLING