I might be pregnant?

I am worried I am pregnant and I need your ladies help to figure out if I might be or not. I am 16 and made a stupid decision (which I ultimately regret but I can’t go back and change what happened) and I don’t know if I am pregnant. Here is what happened. I was supposed to end my period on Sept 12. I ended roughly around the 13th (I say roughly because according to my birth control I ended the 12th but I still had very little bleeding after I was supposed to end but it could have been left over blood because it was very dark brown.) If you’re on birth control you know that the week you’re on your period you are taking sugar placebo pills instead of your hormone pills so you basically aren’t on bc for a week. Well I was supposed to start my hormone pills back on the 13th but I didn’t have my refill so I had to skip that day. On the 14th I went and got my refill and saw my boyfriend, but I didn’t take my pill before I saw him I took it after. When I saw him we did have unprotected sex and he did cum in me ( again it was a stupid decision but I can’t change it now.) I took my pill about an hour after we had the unprotected sex. I didn’t think anything of it because I forgot that I missed the day before and that I wasn’t taking my hormones for a week. Fast forward a few days. I started getting worried about being pregnant so I started my research. My breasts started getting sore around the 19th. And they have been progressively getting more tender. But that is the only symptom of pregnancy I have other than the discharge but I usually have pretty weird discharge (it is usually a white creamy color and it it either super thick or pretty runny and I can sometimes get a lot at once.) But other than that I am not nauseous or vomiting, I am not peeing more frequently, I’m not fatigued, and I’m not having food aversions. The only thing is my breasts. Well I did the math and was going to take a pregnancy test on the 28th. I couldn’t wait so I took two on the 23rd and both were negative. But it was also pretty early considering you usually have to wait until you miss a period but my period is a ways away and if I can find out if I’m pregnant before I miss it I want to. I read that your breasts can start hurting due to PMS about 2 weeks before your period. That’s about the same time mine started hurting but they have never started hurting that early. Like I said I am 16 and I am very scared. Actually I’m terrified and i don’t know that will happen. Can someone older and wiser please help me out??

Please don’t leave negative, degrading comments. I know I made a stupid choice by having unprotected sex and not doing it safely. I am acknowledging that and I have. But that stupid decision might have a very very big repercussion and I am asking y’all for help because I am lost and confused and scared.