My period is supposed to start on Sunday, and I got a BFP last night and this morning.  I'm freaked out that AF will show up anyway and it'll be a chemical pregnancy. My stomach hurts, and I keep thinking its uturean cramps. Is that normal? I don't want to exercise and stress my body out if it's trying to hold on to a pregnancy. But I know all this worrying isn't helping either. Thoughts? Should I be concerned? :(