I think I overdosed. I just wait it out?

I took 7 pills of phentermine throughout the day & by night I felt nauseous, threw up, felt very lightheaded & dizzy, cold sweaty hands and feet, really fast heartbeat, short breaths, headache, slight chest pain, tingling all over, weakness, and dialated pupils. I didn't get help so I stayed up all night with these symptoms. It's been 2 days I still feel nauseous, get headaches, lightheaded, weak, fast heartbeat, cold hands & feet, dilated pupils, tingling, and I can barely move around a room without getting out of breath. The fast heartbeat & shortness of breath are constant but the other symptoms come & go multiple times throughout the day. This morning was my first time eating since that night besides a couple small forced snacks (2 days ago) and I threw it up. I don't know how long these symptoms are supposed to last, if they're even supposed to last.. should I just wait it out?