I had a miscarriage on Jan. 2 2018?

I had a miscarriage on Jan. 2 2018. I found out I was pregnant again! On March 1st. Had my first normal period after miscarriage late night Feb. 2, Was wondering if u could help me with the possible conception dates. Had sex the 7th of Feb. Last day of period. And then again on the 12th and 14th. I’m pretty sure the later dates are the winners but a little concerned just when my ovulation was due to miscarriage. Thank you if u could help

Age: 32
Female
Medications: None
General Information: Had an ultrasound on March 28, tech said I was measuring at 8 weeks. With a due date of Nov.9, 2018