Stuck & Confused 🙈

Summer
So, I had my first period on December 18th after getting off of the Depo shot & it lasted until January 9th, I believe. My boyfriend and I had sex that night, the 11th, 12th, & 15th. I'm not sure whether or not my period is going to come back again on the 18th (tomorrow) considering I could have irregular periods for awhile after coming off of the shot. 
With that being said, I have been having weird pains in my lower back & on my left side just above my hip bone, super dull cramping, I've been so gassy, I've been eating everything, my mood has been one hell of a rollercoaster ride the past few days.. I don't know whether to test or to wait and see if AF is going to come 😅😬 this is so frustrating for me because like i said, i could have very irregular periods, so i don't know what i should do...Â