Pregnant and worried!

I am so excited that we are having another baby.Its not like this baby is a surprise, we were actively TTC,but for some reason, tonight I cannot sleep because I am so worried about having a miscarriage. I'm not even kidding when I say I was border line about to have a panic attack because I was thinking about it way too hard.I've never had a miscarriage ,both pregnancies were healthy and fine,so I have no clue why all of a sudden I have this fear.Now I'm sitting in the living room watching Jimmy Fallon recordings because I wont stop thinking about it.Any other ladies have this fear? what did you do to get over it?