Need advice

I was supposed to start yesterday according to 3 different apps and af hasn't shown her face. I was trying to conceive with my ex before we split and never got pregnant. I just got with someone 4*15*15 and Tbh I'm really nervous and scared. I told him I haven't started it doesn't seem to scare him at all. I have 2 other children I raised by myself. I just kinda need some support. It would be his first my 3rd.