Can anxiety medications worsen anxiety during pregnancy?

O.k., to make a long story somewhat short, I'm a 25 year old mother of 5 young boys, aged 6,4,2, and twins that are 7 months old. I found out last week that i'm pregnant again. I was diagnosed with an anxiety disorder when I was 19. For years, I had mild, almost unnoticable anxiety attacks. When I met my current husband, all of my anxiety snowballed, and I was having anxiety and panic attacks all the time. I wouldn't eat for days on end b/c I was scared of having a panic attack and getting sick. I finally began taking lexapro, and for the most part it worked pretty good. I only had anxiety flare ups around my period. Now that I am pregnant again, my nerves seem out of control. I wheened myself off of lexapro for my last pregnancy, under my doctor's instruction. This time, I'm doing the same thing, but my nerves seem almost unbarable. Usually, I know the triggers for panic and anxiety attacks, and can keep it under control, but now, I can't seem to ever fully calm down. Is this ever gonna stop? To make matters worse, i've ALWAYS been a complete hypochondriac, and most of my friends with children have had morning sickness, which I haven't had with any of my pregnancies. I guess, i'm just worried about everything and are asking for opinions on whether or not my anxiety is going to get better as the pregnancy progresses and if there is anything I can do to calm myself down, so eating is possible. Any suggestions would be helpful.