Nervous/worried

I took a first response on Friday and got a faint positive, then AF was supposed to start yesterday and it didn’t so I took a clear blue digital and it said “pregnant”. Still hasn’t came, so I took another first response earlier and it was a stronger positive than the one I took Friday. Could I still be at risk for a chemical? I’ve had two in the past so I’m very nervous and I feel like I can’t get excited because I don’t want to be disappointed again.