Trying to conceive

Deanna • Just a couple that`s been ttc for a year an 2 months.
So my last period was the 22-27th of February, my fertile window was 5-10 I was suppose to ovulate on the 9th. 
I had sex the 7 an the 10th the 18th an 19th my period was suppose to start this month on the 22nd an im currently 4 days late? Could I be pregnant. 🙏