Classic Migraine, sensitivity to light, nausea, extreme pressure ...

Classic Migraine, sensitivity to light, nausea, extreme pressure and blurred vision. Tried everything else, finally Imitrex. First 30 min. I felt a cold sensation, especially in my facial area. Felt as if my bloodstream was flowing again. Then, suddenly realized I felt like myself again. My concern, women in my family have a very strong history of high bp & strokes around age 50 (I'm 34)... have I found my miracle drug or am I putting myself at a higher risk for more serious dangers?