What Causes Headaches, Syncope, Cramping With Pins And Needles In The Hands?

iam a 25 year old female, recently ive been feeling dizzy and very spaced out. I get regular headaches, sometimes when i get really dizzy, i see black spots and pins and needles in my hands, and i feel like iam going to faint. When i look up it feels worst and brings it on more. I have been suffering from very painful cramps in the abdmonal area as well, only been happening for 2months now. Most days i have a upset neause feeling in my tummy. please help, this is really freaking me out. Its effecting my life and moods :-(