Anxiety?

So lately I've been having what my doctor says are panic/anxiety attacks. In 29 weeks pregnant and haven't had a problem my whole life. But when it happens I'm just sitting watching tv or laying in bed out of no where. I've always had a problem with picking at my skin and scabs and pulling skin off my lips and had no idea they were signs of anxiety! I'm trying to figure out why this is happening and how to keep it from happening because it's really scaring my husband and I. Any advice is welcome except negativity thanks!