Aww, it totally depends on how you feel about it deep down and what you think is best for the future.
Consider things like how long you've been together, how you feel the relationship is now and how you think it wll effect it, how you'll save and where you'll set up a home for your family.
Once you have those things in your head you might find it easier to consider your options.
Anything is possible and sometimes what looks like a scary sudden situation can turn into the most amazing thing in your life that makes you the happest person alive.
I'm 22 (had my son when i was 21) and my husband is 29 we were both on low income jobs but saved since we met 7 years ago, therefore we were able to buy our first house when i turned 18, gone from there really, kept saving (we don't drink, smoke or go out regularly) sold our house and brought a family one this year and our family is now growing. Things are amazing, we are now on one income and a low one at that but we are super careful and make it work! - i hope this shows anything is possible!
Give me a shout if you like and i'd be happy to help