Question!! Thanks in advance 😇

So I just finished my 1st month TTC. I've been seeing a lot of people talk about using preseed and I want to try it. The only thing is...I haven't gotten my period yet and I'm wondering if I should wait until I get it to try the preseed? It's not late bc I'm pregnant it's late because I just got off birth control in July and my period is trying to regulate back to normal but I've never had a regular cycle except when I was on the NuvaRing. So should I go ahead and try the preseed or would it be a waste of time since I haven't gotten my period? I'm sorry if this sounds dumb lol but we have just started this process and I'm trying to gain all the knowledge I can, and you guys seem to know your stuff 😉 thanks again!