in confused please help me ladies. honest opinions!

let me start venting... I'm late 3 days from my period and yes I had sex during my ovulation days without any protection & he busted inside me. I want a baby so bad, but me and my man been ttc for the past 3 months and nothing and I get so discouraged. On Sep 2017 I suppose to get my period like on the 23 and I was late for 6 days and I thought I was pregnant, but my period came. I got scared because usually my period is never late! ok so on Oct I got my period on the 28 on Nov I got my period on the 26 and Dec I'm guessing the same day, but like I said I'm 3 days late now & honestly I'm confused. I don't want to get too excited or maybe I'm just stressing it and thinking it to much. Ok, this month was different usually when I'm ovulating I get like small cramps but not as much and my boobs feel sensitive well not this time. I started getting this symptoms on the 25 and now I don't know what to think anymore. I'm so confused and lost like what's going in on with me ?