pregnancy not feeling real

This is my third unexpected pregnancy I be 21 weeks tomorrow  I've got two beautiful children and this was how we were going to keep it as. As much I loved more and love babies we wasn't planning or expected another as my two are handful enough. We fell pregnant after our accident and I took the morning after pill 9 hours after the accident... to be honest I fell pregnant with my first on the pill. So this is where I believe the morning after pill didn't work.... first few months we didn't take the pregnancy well because we were going through a lot of things partner been off work a year (slowly going back now) and my contract ending this month which they cut my contract two month earlier as expected and they won't keep me either and I won't have chance finding another  job. But family owns business so she said I can help so I be left with no money. So I will earn little enough to do things with kids. Bills would be paid off fine luckily.... anyway forget that... I just don't know why this pregnancy feels so unreal. Even tho my bump is growing baby is moving and I'm having all side affects as we should... I am happy I'm not sad about it at all... but it just feel like I'm in a dream... I tried to buy baby things but I just couldn't bring myself to it because I feel it's not really happening or I'm going to go through a loss if that ever happens cause I know if it did I would not cope well as expected anyway. Has anyone felt this way and turns out okay... I think I'm just scared that's all xxx