Depo Shot

You guys... I’ve been on depo for quite a while now. My last period took 7weeks to come on, and I haven’t had a period yet. I was supposed to get my shot on the 19th but couldn’t until the 25th because the pharmacy didn’t have my depo. (6 days late) By the way, IM NEVER LATE! Also, I had sex around 12:11am on the 26th. My question is do you all think I could be pregnant or maybe it’s just another irregular period? My <a href="">period app</a> says it was supposed to come on on the 28th.