Unfortunately if you have been there under a year & the position is no longer available, ie the salon is closing, there isn't much you can do and I'm afraid you won't be entitled to redundancy pay. They should however give you any money owed and also money for your notice period unless you are working it. If the company is going into administration and they can't pay your owed wages then you need to put in a claim with the administrators and they will pay you once any assets have been sold.
If its just a case of the owner closing then they need to pay you straight away, get some legal advice if they don't.
With you being only 12 weeks you wouldn't have to tell a future employer that you were pregnant, and although you wouldn't be entitled to maternity pay from your new employer, providing you have worked a certain number of weeks while pregnant, you would be entitled to maternity allowance from the government which is pretty much the same thing.
Good luck & big hugs, I got made redundant a few years ago & it's horrible. Do you have any insurance against it? I have insurance now as I couldn't bear to be in that situation again.
xx