Is it possible?

My boyfriend and me had sex about a month ago didn't think anything of it, we had sex again last Saturday, I've been cramping like no other lately there's been light bleeding and I've been craving nothing but sour patch kids and peanut butter and jelly 🙄 I've also noticed I've gained a little weight to the point were I can actually notice it. Please leave suggestions or comments below. I'm in desperate need of advice I'm 17 btw. I forgot to mention I was late for my last depo shot. Then got it again a month later