Excessive discharge: TTC but is this an infection? STD? What's going on?

Sharon
I've been having this weird excessive discharge for a few months now, maybe 3 or 4 months. It's usually a clearish kinda or has a yellowish tint with a weird smell. My 🐱 also sometimes feels irritated and it was painful when I tried to have sex with my fiancé. I've also seen traces of blood when I wipe sometimes. Does anybody have any idea what could be going on??? We're TTC soon and I wanna make sure I'm healthy. 
  haven't gotten a chance to see a doctor because I don't have health insurance. Should I be really worried?