Question regarding pregnancy/miscarriage

Tia

I had a very positive opk for 4 days, took a pregnancy test and it was very positive. Took a digital and it says pregnant. The kicker is that, I had a period from February 28-March 5 and another from March 29-April 4th. When did I actually get pregnant? Am I 6 weeks or am I 1 1/2 weeks? Or could this be due to a miscarriage that I didn’t realize was a miscarriage? I’m hesitant to be excited.