std scare ??!

So I recently had sex with a new sexual partner. We used a condom during intercourse but we both went w/out protection when we gave each other oral sex. (I know stupid). Literally two days later I started to have spotting. With each day the blood flow is heavier..maybe not heavier but more constant. I’m pretty sure that’s a symptom of Chlamydia but how likely is it that I got that std from my new partner if I showed signs immediately after, like is that normal?? Also for those who have gotten Chlamydia what we’re ur symptoms? Ps. The spotting could also be from me just getting on birth control but I have never experienced this before....I still plan on getting tested but for now I’d like some feed back !!!! Thank u