I ejaculate and i cant stop!!!?

Ok me and my gf have been sexually active.. when i ***.. it comes out like BOOM!!! BOWW BOW BOW!!!! IT DONT STOP!!!!! OUR WHOLE BED WAS WET!!! AND MY NUTS HURT!! IDK WAT TO DO!!! NOW MY GF SCARED TO **** ME CUZ SHE SAID SHE DNT WANA BE SHOWERED BY MEXICAN THUNDA!! WAT DO I DO!!!