pounding headache after i had malaria twice?

I started getting these pains in August 2011 after I had malaria twice. I get these intermittent paroxysms of headache, with radiation into the lower back and upper thigh. These headaches might disappear for a month or two and then it hits me. It starts as a pounding headache with a whooshing sound in my ears, going on to a pumping sensation in the back of my scull and feels like an increase in pressure in my scull. The moment that happens, the pain starts in the upper thigh muscle, a stabbing pain and usually a pain in the middle of my lower back. There is a “pulling” of the left eye, although without definite diplopia. The pain is only there for 10 minutes max and then goes away completely for an hour and comes back, intermittently for up to 6 hours (Sometimes only for an hour). During the headache I have this dull feeling in my head and at times the pain can be so intense that I can’t focus, I can see images but it’s a tad blurry and it’s like I can see words but can’t read them.