Age difference ‼️‼️‼️

So I found out that my boyfriend has been lying to me about his age. The whole time it was a (FAKE) he had. We would go to clubs, bars out all the time and then I find out that I'm 4 years over than him. I have never dated somebody younger than me, it's just something I don't like to do. The problem is that now he got me pregnant and idk how to feel. It's like I'm in a roller coaster 😔😔😔. I don't want to date a kid, can u imagine raising a kid with a kid. He's 20 yrs old. 😣