if im 11 weeks & 3 days when did i get pregnant

The 11 week 3 days is most likely when you had your last period. So people tend to ovulate about 2 weeks after the start of their period. Which would be around when you would of concieved. This is not 100% because people ovualte at all different times. Which is part of the reason they cannot really go by the conceived on date because if you having sex more then once a month or even once a week it is hard to know the exact day. Although with my son I do because we only had sex once that month...