how to stop a marijuana high?

I smoked a blunt at about 12pm last night with one other friend. I'm a 20 year old female and I only weigh about 106 pounds. I had a panic attack and basically just an all around AWFUL experience. I woke up this morning and I still feel weird and I think I might still be high. Can someone please help me and tell me how to end this? I've been drinking water and I just finished a huge bowl of rice are there any other suggestions?