Chlamydia, yeast, UTI? Help!!!??

Clois
I'm halfway through my pregnancy and so far I've had what I've assumed is the normal discharge expected while pregnant. But starting yesterday my discharge was way more than normal. I constantly feel wet? I also pee A LOT which I assume is from being pregnant but I will think I have to go but only a few dribbles come out sometimes. And today my vagina feels kind of raw, irritated and itchy...
Could this be an STI like chlamydia. I'm only sexually active with my baby daddy no one else. Or is this the yeast infection I hear women get a lot during pregnancy. Maybe UTI!? I go to my doctor next week so I'm waiting it out but I'm super worried I somehow have an std or that a yeast infection is somehow hurting baby?? I just want to know if this is something I need to be so panicked about :(