So for some reason I decided to take the plan b pill in April and my period came one day early but otherwise normal. Then in May we got scared and I took the plan b pill again. Period came at the right time it was just very light and only lasted a few days. June came and we decided to heck with it and ttc. We had sex every day and then I ended up having my period but 11 days late. We would like to continue ttc but I'm not sure which period start date to use. Is it more likely that this period start date is the right start date for my cycle? Or are the prior start dates the ones I should go by?