So I just got done having my period, which was so! Light. There was days where I didn’t notice any blood. The day before…

So I just got done having my period, which was so! Light. There was days where I didn’t notice any blood. The day before last I had no bleeding and then at about 8 last night I noticed a little pink spotting. Purple was my light period, pink was my day I didn’t have any blood. ???? Anyone know why? I just had my gallbladder removed also so could that be a reason ???