pregnancy scare

I've been dating a boy name Hakeem for 5 months now. He already has a son who turned one a few weeks ago. Hakeem also turned 21 on Monday. I'm 18. We have been having unprotected sex for the past month now. I've been feeling sick and sore all over the last week. I've had tender breast & I can't hold any of the food I eat down. I've been pregnant before in 2014 but Iost my baby at 17w4d. I keep giving him little hints that my stomach hurts so bad but he's giving me the "oh maybe you need to eat or use the restroom" catchphrase. I've tried all home remedies for "upset" stomach that only makes it worse. I'm starting to wonder what if I am pregnant?! I'm really scared and I don't know what I should do 😩🤷🏽‍♀️ any advice?