Single and still wanting a bby

Sophia
I lost a bby 3yrs ago now and since then ive not taken any contraception in any form. Ive had a few boyfriends since and not one managed to do the deed (even if they had kids with a previous woman). Ive got a guy Ive been seeing casually for a while now he knws i want a bby and has agreed to b my sperm donner in a sense. But nothing is happening, sometimes im a couple of days late on my period but thats it.. Is there something wrong with me?