Proposals and chastity

Assalamualaikum

I have committed zina a few years ago, since then i have sincerely been repenting. I now would like to get married but am not receiving any proposals, what Dua’s can i recite to bring about a suitable proposal, and if i do receive one, do i have to let the man know that i am not chaste, and if yes how do i go about doing so?