Just got off depo June 28th and had unprotected sex July 5th and one week after that I started spotting for only a couple of hours then a couple of days after that me and my boyfriend have been a lot more tired that usually and I have been feeling sick like I am going to through up and I have in my mouth and I have been having headaches a lot... I don't want to say I am pregnant and not be sure cause me and my boyfriend are really wanting a baby soon! What should I do ? And could I be pregnant?

Wait until your period is at least 2 weeks late, then test using first morning urine.

You had sex, so yes, pregnancy is possible.