should we move or stay a little longer

So me and my fiancé have been living in the same apartment for 3 yrs now it has been convenient for us really affordable but now we have our first baby together and we kinda are not sure if we should move or stay another year I'm a first time mom so I'm not sure how financially it is with a baby our apartment is a small one bedroom so when the baby comes in May 2017 that means we'll all be sharing the room I sorta wanna move I mean I'm kinda tired of lookin at this place and we need more space  and then again I sorta wanna stay another year cause I know it'll be affordable for us guess I wanna know if it would be smart for us to make into a new spot before the baby gets here ? Oh and I should add we have a baby pit bull as well 🙄