Trying to get pregnant gor the first time!

I really like you and I really want one I try and try but you can never seem to get pregnant since 2013 I started birth-control I was doing the depo, I stopped it after the third shot I was supposed to get it because I was nonstop bleeding and after that I was waiting for an entire year I had to get put on The pill to stop the bleeding quickly. After I started getting regular. They started turning into irregular periods so it's been hard for me to know when I'm ovulating or most fertile. Now one 2017 starting in June I started slowly going back to having normal regular periods and I am kind of wanting to know if it's because my periods that I can't get pregnant or what. The month of June and July I got my period starting the fourth and ended on the ninth and then the month of August I got my period on the second and it ended on the six now or at the end of August you I got my period yesterday august 30.I just want to help or something because I'm trying to get pregnant and it's so hard

Ovulation occurs about 14 days before your period, so if you periods are irregular it can be hard to know.

There are ovulation test kits you can buy at the chemist that detect a surge in the LH hormone that occurs about 24 hours before you ovulate. They work really well.

Even if you don't know when you ovulate you could just have sex every 3 or 4 days after your period finishes for 2 weeks and you should be ok. Basically sperm can live for 3-5 days inside you so if you ovulate you have sperm there waiting for the egg.