Gee, it sounds like you've got an awful lot on your plate so don't feel like you're complaining. Apart from airy fairy "things usually work out for the best" advice that I could give you (which happens to be true but can be difficult to believe when you're in a bit of state) I think you have two options:

1. Work out your contingency plans eg. if you don't end up getting the job (and fingers crossed you will), what will happen? Will there be other positions within the same company coming up that you can apply for? Is it a showstopper if you don't get the job ie. were you banking on returning to work after a certain time etc. etc. Same with the house - can you move to family/friends if you can't actually find somewhere to live? I know that's not ideal but the baby won't give a hoot where you're living as long as he/she is fed and snuggly.

2. Delegate as much as you can. Now I know you can't do this re your job application and interviews but could you leave the majority of the house-hunting to your partner/family members or even a real estate agent?

I find that when I bottle up my worries by trying not to whinge, I can get myself into a complete flap but when I actually verbalise them to my partner, it is actually a problem halved so do share your concerns. If you work through things one step at a time things seem more manageable too so as much as possible, say to yourself, "OK today I'm going to concentrate on my job application and not even think about the house situation until tomorrow/whenever."

Go easy on yourself and good luck.