Hi guys

I am new to TTC, i have been on depo since my son was born (he wasnt planned so yes I promise I meant it I am new to TTC hahaa) I went off it and got my first "cycle" the 13th of this month. Im supposed to be ovulating in like 2 days and I woke up crampy this am. Low ald behold Im bleeding :(. Do I consider that a start to a mew period? Keep doing my OPK? Implantation? Any thoughts amd encouragement would be great! Feeling kinda down about it!