Anxiety

Hi, I’m 16 weeks pregnant and my anxiety is to the roof not knowing the cause. It started last week when I was thinking why I’m sad and what can I do to feel better then all of a sudden my chest got tight that I couldn’t breath, unable to stay calm, i was pacing throughout the house and started crying (felt like it’s a panic attack) then after that day everyday I would have anxiety that kicks mostly in the morning and at night before going to sleep. Sometimes, I would wake up in the middle of the night scared and couldn’t go back to sleep cause I feel like I’m not going to wake up anymore. One night, I’m picking up my husband while waiting for him in the car I couldn’t breath, I was nervous about something that I don’t know, my chest was getting tight and I wanted to rip off my clothes cause I felt something was making it tighter. I went to my OB and they gave me zoloft but my anxiety got worst, I couldn’t calm down the whole entire night and the next day. I was advised by my OB to go to UC but they couldn’t do anything (which I know they couldn’t I don’t even know why I’m there trying to find cure) then they told me ER could help me better so I went but again same thing they couldn’t do anything. I felt hopeless, I don’t know what to do anymore. I know I have to start helping myself but how? And where do I start? I really want to enjoy this pregnancy. Anyone experiencing this?