in need of help!

I got off my depo shot in February but I never really stopped having periods even on the shot they just wern't regular? And now that I'm off I've been having 33 day cycles which I've never really cared or payed much attention to until now that I'm ttc I'm just wondering if I'd have any problems actually getting pregnant we started trying last month but I don't think we hit my ovulation day of anywhere near it and this month we've had sex almost every day or every other day and i feel like nothing has came from it I know others have been trying for way longer but it just breaks my heart so bad because this month I had a very unusual period it started out very brown and very light it never really hit a normal flow so I got a little excited thinking it was implantation bleeding so I took a test today and it was a bfn but maybe I took it to soon I honestly don't know but I feel like it's just not a positive what's your guys opinion?