Transvaginal Ultrasound ? How early can they detect pregnancy ?

Alex

These are my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> app Of March & April ! I'm currently pregnant but wondering if I got pregnant in March or April (I thought April) I had my period March 11th had unprotected sex on all the days with a heart. I took pregnancy test this month but couldn't remember besides on the 10th but that's before my period started.

An then this is the April one I thought I had my period starting the 6th (idk if it could have been implantation bleeding it was a lot though) and had unprotected sex all the days with hearts but had a transvaginal Ultrasound on the 12th of April so I was thinking if I had gotten pregnant in March would they have been able to see that I was pregnant on the transvaginal Ultrasound ??

I'm showing GA at 14 weeks 2 Day Today ( July 13th 2017) that would make my due date about January 9th