Confused

Hi all! I need answers.. So I stopped my birth control first week of January. Had my period on the 16th (2 days before expected). Light, but felt normal to me. But got my period 2 weeks later, on the 31st and the first 3 days were medium to heavy flow and today is just light. Is this normal? Will it mean that it regulated itself this quick and I may ovulate in the next 14-16 days? Has anyone gone through this before? Thank you in advance!