Yeast infection 😵 what should i do? TMI

I'm 17w3d and last week I had an apt with my Dr and found out I had a uti without even knowing it. So I got an antibiotic and just a couple days after I started using them I noticed a thick white discharge and it also burns and itches down there! Sex is painful, it burns mostly..and today my hubby actually told me that my fluids were making his penis burn a bit!

Why is this happening and what can I do to make this better? Any advice is appreciated! Sorry for the tmi ladies but I need help!