After a recent migrane i took my meds and a painkiller. but there is still a lot of pressure in the back of my head. does migraines cause all this?

Definitely yes: There are many good medications for migraine treatment. Migraine is a serious and complex neurologic disorder. Today effective management of migraine involves three specific strategies: 1) patient education 2) non-pharmacological management (diet, sleep hygiene, acupuncture) and 3) pharmacological (triptans, topamax, (topiramate) etc) management. Rec.:see orofacial pain or headache specialist. Hope it helps.