Pregnant with second?

Hey guys, I am 24 years old and mother to an amazing son. I have been dating a guy for a short period, he’s a great man and would make an excellent father. I just found out I’m pregnant (probably 4-5 weeks) and feeling like I don’t want another right now. I do not want two “baby daddies” at this time and we’re not married, has anyone else ever been in this situation can you tell me your stories?? I’m feeling so torn!!!