When I go to college everyday, while getting ready or waiting for the bus, I feel nauseous before the bus arrives, I start breathing fast, my heart rate starts increasing rapidly. And it goes up to 120+. It gradually subsides as soon as I sit on the bus and I recover. I use some medicines like Clonazapam 0.25mg and ciplar la 20 mg but it doesn't make much difference. please help. and what should I do?