Opinions?

I'm 12 weeks 5 days pregnant and very early on in my pregnancy I started bleeding pretty bad. I was bleeding for four weeks. I ended up going to 3 ER's. Not one ever telling me why I was bleeding but giving me ultrasounds (I couldn't see) and telling me they saw a flicker. I finally got in to see my OB and she said since I had an ultrasound I don't need to have another one so I didn't get to hear my babies heart beat or see my baby.. Should I be upset about this or should I just let it go and wait until my 20th week like my doctor wants?