Hello Sir , My Name Is Aarav I M 19

Hello sir , my name is aarav i m 19 year old boy , i have been facing the problem of nightfall since 17 , recently nightfall occours 5times a month , i stopped masturbating at the age of 17 , i never had sex , in dreams i did sex nd withing a second my sperk releases , sometimes when i just put my penis into vagina it releases , please tell me is it normal or i have a patient of premature ejaculation? How do i control night fall? Thank u sir