Anyone taking Zoloft?

I just started it 3 days ago for severe anxiety and at first I felt fine but now I’ve had two debilitating panic attacks and I’m feeling very spacey and zoned out. I had one today *during therapy*. I had to call my dad to take me home because I couldn’t even drive. Both my psychiatrist and therapist told me that I could have these reactions for the first few weeks. Has anyone else dealt with this on Zoloft or another SSRI? If so, how long did the awful side effects last?

Thank you in advance!