Anyone ever had a positive opk on Nuvaring?

Hi, everyone. I inserted the Nuvaring on Thursday night after starting what I thought was my first normal period after quitting a mini pill I had been on. After insertion, the bleeding slowed down and had stopped by mid-Friday. I called a friend who said that was normal for her, so I didn’t think much of it. Well, today I took an opk because I had stopped bleeding so fast, and it is SUPER POSITIVE. I took an HCG test that maybe has the faintest something, but I’m pretty sure it’s just negative. I don’t really think this is normal, unless that process had already started prior to inserting the ring and it was just breakthrough bleeding. My husband and I did have unprotected sex once earlier this month, but I was bleeding, so we hadn’t thought much of it. I know pregnancy is unlikely given the timing, but now I’m freaking out internally, and my doctor won’t be back in the clinic for two weeks. Help!!!