Could I be pregnant

Emma

I’m 16 I’ve been having weird symptoms. My breast have became larger. My veins on my breast are so prominent. The thing is me and my boyfriend were trying but I then started my birth control again. We still don’t use condoms. But I’ve been having clumpy periods and Monday I started spotting then it went away a day later. My friend who is also pregnant said she has the same. Also my dog had been super attached to me. What’s going on?