My Blood Pressure Has Dropped To 107/43?

Lately I've been feeling really tired, getting more and more headaches, getting dizzy, and my vision goes blurry sometimes :( I'm a 25 year old female, and I know girls generally have lower blood pressure than men- but I'm wondering if my symptoms are due to my blood pressure? It's been low for a while, but not this low. I drink lots of fluids, I'm otherwise in generally good health (I smoke, maybe 3 a day) but I don't eat junk food, I'm 5 foot even and 105 pounds so I don't think I'm technically over weight lol. Just seeing if anyone else has been feeling this way? And what they did to feel better? I avoid stores now because it's like a sensory overload- my eyes twitch, I cant focus and occasionally my knees buckle. I think I need to see a doctor, but if it's something I can fix myself- I'd rather :)