Please tell me I'm not alone...

Tiffany

I'm 20 weeks as of today. Since I got off work last night I have had dull/mild cramping, pressure and tightness and my area is starting to have a burning to it. I'm a little paranoid BC I lost my daughter at 37 weeks just a year ago. I had pre term labor with her at 25 weeks also was put out of work. I've only has Singleton pregnancy before so all this twin stuff is new to me. Is all this normal this soon??????