Had a scare last night 11 weeks 4 days

well last night I had cramping and leg aches like I get before I used to start AF so I started worrying but since  had no bleeding I was ok.....well  after a few hours of this I went to pee and notice I was bleeding so I of course freaked.  So called my DR office and they wanted me to come in.  We got there and the weather got bad so they made us all go to the basement cause of the tornado warning.  So I had to wait even longer to know if my babies were ok.....Finally around 8:30 we got in for the U/S and both babies were kicking like crazy and he noticed I have a low placenta so the bleeding could be from it.  So nothing to serious Thank God.....both my babies looked as perfect as they could......they are really looking like babies now so precious.