DESPERATE FOR ADVICE

I have been off of my nuvaring since October 2015. My husband and I do not use any sort of birth control. My last period was February 18-22. I have taken MANY at home tests and at the Drs plus a blood test. (My mom had issues with one pregnancy, she didn't know until 5mths). My friend gave me a fetal Doppler and a few weeks ago we didn't hear anything, but yesterday we picked up something that we counted at 130-140 today it's 160. But I hear it on both sides of my hips and I only hear it standing up. I am wondering if this is worth trying to get an ultrasound. I have posted a couple of times but I never receive any help. At this point I don't know what to do.