How To Treat Severe Headache,rashes On Stomach And Twitches All Over Body?

hello, i was wondering if you could help, i have had severe headaches for about 2 months now, i never had headaches before until one day, and i couldnt move i was in so much pain, since that day, a rash has came up on my stomach and i get big twitches all over my body, mostly in my legs, they shake alot. I feel sick sometimes to with a sudden numbness in the middle of the night in my arms, or sometimes in my feet in the day randomly, thankyou.