I have no idea what just happened

So I smoked weed today and I was fine so I took a shower next thing I know I get super dizzy and I end up in my tub sideways with my head and knee hitting the sides of the tub I couldn’t stop it but I also didn’t really know what was happening it happened for like maybe a minute then I got up and laying in bed trying not to Freak out I look at my Apple Watch to check my heart rate and it was 150 .... what happened and what do I do