Symptoms please helpppp 4dpo

I had intercourse middle of the night before my ovulation like 2 am. Im 4 dpo and it feels like theres something going on in my abdominal like i cant explain sometimes i feel like im going to throw up and sometimes i feel somethinh hurting my back but just mild and then my nipples are getting bigger and like it hurts when i touch and i have headache sometimes i feel dizzy and fatigue i cant even go out to bed i just need to force my body to get out. Is there a chance that im pregnant i really want to have please help!!