Anxiety with pregnancy?

Is that normal? I have never been an anxious person....ever! I have never had a panic attack or anxiety. But as I progress further along I am becoming so anxious it makes my chest feels tight. For example.. the other night I had a fear that my above ground pool was going to break open. So unrealistic and stupid. But I worried so much so that it took me 2 hours to fall asleep... I then woke up at 1:30am and 4:20 am to check on the pool. Wtf!? This is not like me!! I have never had this worrisome feeling before and I hope it goes away after pregnancy. Anyone else super anxious during pregnancy?