How To Get Pregnant?

pregnant?
My name is shelby, and I was on the Depo shot for almost a year. I just recently got off of it, due to migraines.. I have been with a steady boyfriend for almost 8 months, and we have had unprotected sex quite often without any birth control. he did not cum inside of me, I don't recall, but I am starting to get some symptoms of being pregnant. I have irregular periods, therefore I don't know when to take a pregnancy test. I have been sick, I haves threw up once in the morning. back pain, headaches, bloated, and sore nipples and breasts. I am on my period right now, and it is extremely heavy. I do wish I was pregnant, just don't know when to try. :/ please help me in anyway possible. thanks