No longer on the shot, confused?!

Elizabeth • 28 & happy.
I was on the shot for 6 months. On June 11th it ended. I got what I would like to think was my period on the 18th of this month. It only lasted about three days and was hardly heavy and I did not have many cramps. The last period I had before this was pretty normal. My partner and I do not use condoms, dumb, I know. I have a hard time using them with other bodily issues that I have. I am worried I may be pregnant but I've also had a few miscarriages and it may be hard for me to become pregnant anyways. Could someone give me some advice as to if I should take a test or what? I also don't have health insurance at all.