Panic attacks! Need some advice

I'm almost 15 weeks and I've always had anxiety. But my panic attacks are really bad right now and all my ob I'd telling me is to take benadryl. I'm finishing full bottles in 4 days with how bad they are. And my therapist is taking forever to even see me. Can anyone give me any advice? I can't work at fedex behind the shipping counter this way. It's too dangerous to work in either condition....I'm really frustrated.