Help!!

So Wednesay night I started having menstrual like cramps and low back pain I could not sit! I tried a bath with my jets. And nothing!! So I went to bed! I was a little sore yesterday when I got up for work but went in and after lunch it started back! Pain was worse and lasted 5-10mins but never went away! Called my ob they sent me to labor and delivery were I was monitored that was showed I was having contractions so after fluids and two injections because the first one didn't stop them it finally stopped and I was sent home but on bedrest until I seen my OB on Monday! Well I have mild cramping but my concern is my baby is usually active especially when I talk to him or anything but he hasn't been!! What do I do?