Period while pregnant??

My husband and I have two beautiful baby girls! They were both "accidents" (thanks to God, couldn't live without them!).. My husband came inside me once with each of them and I was pregnant both times!! Our youngest daughter is 3 and we decided we want to try for a boy!! 😁😁 While I was ovulating we had intercourse probably 4 times and I thought for sure I'd be pregnant however I started my period this month but it only lasted 2 days and was a bit "watery" (is the only way I can describe).. any ideas? Has anyone had a period while pregnant?