anxiety

How would you ladies describe anxiety? 
Since being pregnant I've had (what I think is anxiety) I've never dealt with it in my life! But I find myself getting super scared and worked up over little things, I also find myself thinking of the things that could go wrong in situations, the "what ifs". I also get super paranoid and worried when my husband has to drive anywhere out of town for work. Is this anxiety? It's really annoying and I absolutely hate it.