I've been taking ibuprofen 600mg for headaches for two days now and the headaches won't stop one single minute. ive no other syptoms.

Headaches: This is a difficult one as you are not specific about the exact type and cause of the headaches. Given that ibuprofen (which I assume has worked in the past) has not helped and that the headache has been there x 2 days would suggest to me that you need to see a doctor - preferably one who deals with headaches.

See a doctor: There is something going on that needs to be diagnosed and treated... I would suggest seeing a physician..