I started birth control one month after m/c. i got my period 10 dpo and have had a headache for 2days. prego?

i had a m/c august 13 at 9weeks. i waited until my first period and started using birth control. I started bleeding 10 dpo. and before i was suppose to remove my ring. i have had a constant headache and actually feel kinda queezy.. Could i be pregnant? I started birth control one month after m/c. i got my period 10 dpo and have had a headache for 2days. prego?
I had the depo shot too.Its the satisfects [spellcheck] especially with the depo shot.To be on the safe side you should get a pregnacy test