Another baby?!??

I had my daughter 2 months and a half ago; my boyfriend and I have only had sex once and it just happened to be the first day of my period. Even though I know it’s pretty unlikely I can’t shake this feeling I might be pregnant again.

I’ve been feeling an all to familiar fatigue, a bit sick, and other more personal “signs”. I think but I also think I might just be freaking myself out. My next period is in like two weeks, any tips on not stressing myself out till then??