Dating while pregnant, when to tell the guys?

I’m 10 weeks pregnant, and single, I’ve got guys trying to go on dates with me but I have a fear that I’d i tell anyone I’m pregnant no guys ever going to want to be with me. I already have a 14 month old. I don’t want anyone thinking I’m trashy... i don’t plan on having sex with anyone or anything. When is the right time to tell them, and how do i go about it?