What goin on?

So my boyfriend 💑 and I are really sex active right now . I’m on my birth control pills 💊and I’m very strict when it comes to take my pills on time⏲, most of the time we start having sex without any condom on, but most of the time he puts it on when he feels he’s gonna cum. My last period was on August 8th 📅since then I had to change my birth control pills to a different brand. September is almost gone and I haven’t had my period yet. I have all the symptoms, some kind of cramps now and then, acne, breast sore, mood wings 💆🏻.

Idk, am I pregnant 🤰🏻😭? Or just because I recently change my birth control pills? I’m so worried 😟