Did this ever happen to anyone else?

I smoked weed about a month ago and have had nothing but awful crushing anxiety since then. I had a panic attack after smoking, which went away soon after, but then over the next week had 3 more panic attacks, and I had never had them before in my life. It was medical grade 70% THC stuff from Florida that I smoked with my pops and uncle on my birthday, and a month later I still get extremely nervous, anxious, nausea, and chest pain routinely. Is this normal? Has anyone else experienced this?