Everytime i stand up i get a head rush and have to squat down so i don't fall and my ears ring..i just almost fell 2 min ago should i go to the er?

Certainly : It never hurts to have something like this evaluated by a doctor. An er may not be necessary if you have a pcp who will see you on short notice. Hope you feel better soon.

Urgent care is cheap: At 18, you may be anemic--i'll assume you aren't taking BP meds. It will cost you $200 or so less to see your doctor or go to an urgent care where they can check your BP and do a blood count.