implantation? possible pregnancy??

So I just got on the depo provera shot almost 2 weeks ago. Me and SO we're having fun drinking and got way drunk and we had a little accident and that was on April 26th. For the past few days iv Been experiencing some harsh cramping to the point where I needed to sit before it went away after 5-10 minutes. Yesterday I had one wipe of super light pink spotting barely noticeable and then today again I had the light pink spotting which is the picture below. Is it possible I conceived since the shot wasn't in full effect is this implantation bleeding? With my first pregnancy I got implantation when I was already 5 weeks and it was also barely noticeable I almost didn't see. I'm just asking because I know implantation can occur 6-12 days the earliest and this is the first time iv had the shot so I'm really questionaing all this.