Implantation?

Implantation or period? I’ve had this on and off for 11 days. It just stains my pad but it’s never enough to fill it and After sex a little more. I can’t get to my obgyn rn and I haven’t tested since I thought I was just having a light period. But it keeps happening and I have mild cramping nothing crazy extreme drowsiness and I drank recently and I never get hangovers this time I even threw up the day after.im on day 13 of bleeding it’s now a light pink this was the first day

And now it’s very very light