unstable relationship and expecting

I am currently 7w3d and over joyed.
My SO and I have a, for lack of better words, shit relationship. I convinced the night we had make up sex after I nearly kicked him out.
Things have been a bit better since finding out I am Pregnant but the tension and problems are still there. He is a constant liar, doesn't trust me, and keeps things from
Me. Oh and I still haven't met his parents after a year....and we live two streets away from them.
I made the choice to keep the baby, as I believe even if things blow up I could be a single mother. I have amazing parents that will support me no matter what.
I guess the reason behind this rant is I wanted to know if any one else has dealt with the same thing...a bad relationship and expecting a baby.