Spotting?

Brittany
So my period is supposed to be on 10/8. Stopped my depo last month and now it seems like my periods are going to be normal again. Hubby and I are trying to get pregnant and I only had the depo shots 3 times and hoping it didn't mess with my body. Well today I am having cramping and I'm fatigued and spotting. Could it be PMS and my body is just getting ready for my period? Just need some advice.