Panic attacks

So I have anxiety real bad. I've been on the same medication for 1 1/2 years.i started it due to a 3 day panic attack to where the hospital wanted to admit me for 6 weeks but I was breastfeeding and taking care of a 18 month old and 2 month old. Now fast forward to July 2017 I started smoking weed for my anxiety and it worked a lot. Fast forward again to 3 weeks ago, I smoked and had a panic attack so bad my heart was pounding fast for 24hrs, my heart felt like it was going to explode, I was puking like crazy and even when I slept I woke up with raging heart race. So during these last 3 weeks I have had 10. During the day I have a small one where I feel light headed and can't breath and have to sit down immediately. I'm having one again tonight.. Anyone know what may have caused this? Maybe a med change? Maybe go to the hospital? I just don't understand why it keeps happening. I was literally just sitting down and watching tv and next thing I know I'm light headed, hearts racing, and nerves feel like they are in shock, hard to swallow too. I hate this..