Sex, implants and very light discharge

So I currently have the implant, I’ve had it for over a year now, I had a boyfriend who is now my ex but we had sex about 4-5 weeks ago, he came in me on quite a few occasions. I then went out on a night out (drinking obviously) and ended up having sex with this wee lad I knew (I asked him about stds as I am very vigilant) but I also know he’s only had sex with 3 people last was about 6 months ago and according to him he got tested after that and came back negative. I am so worried, I know the wee lad *TMI* teared me a wee bit and I’m very itchy and uncomfortable down there sometimes but other than that I am wondering if anyone could give me any advice or guide me on what it could be.

I also forgot to mention my period should be coming up round about now