Breastfeeding related

Please don’t judge. So I’ve been texting this guy since the beginning of November and we finally went on a date Thursday night. To make the long story short, I had unprotected sex with him. I know I feel so stupid. I don’t know why I would do this. Also, my baby is 5 months old. I immediately took a Plan B when I left his house. But now I’m super paranoid thinking what if I caught an STD/STI or even HIV/AIDS im really freaking out and feeling so fuxking stupid. He has texted me the whole day today and even told me he’s willing to go get tested with me just so I can be calm and trust him. He doesn’t seem like a bad guy and doesn’t look like a guy who would sleep around. He’s very nice and humble but I don’t know I’m really freaking out. I don’t know what to do. I also breastfeed my baby’s and I’m even thinking of not breastfeeding her anymore till I get tested in 2 weeks. But then I live w my grandparents and my mom and they will find something weird that I would want to stop breastfeeding. And I also don’t want to lose my supply.

I feel so stupid all I do is cry.

We want to keep seeing eachother but now I’m feeling like I shouldn’t even do that.