Can anyone help?

I have just moved to the USA after marrying my wife who is from Dallas. Whilst in the UK I was working for a hotel selling to the US Market and as I was moving here the hotel has asked me to stay on, currently they pay me in GBP into my UK bank account, they do not have a US division or bank so cannot pay me into a bank account here in the US.

So the big question... How do I go about the taxes? If I am payed in the UK do I have to pay tax there and here in the US? - I have a P85 from the tax office in the UK to fill in but get the impression if I am paid in the Uk I still have to pay tax there even though i will not be a resident and will definately not be there for longer than the 183 days or whatever or be staying on any trips for longer than 90 days.

I assume as I am married, living and working in the US I will have to pay taxes here but in the USA but as I ahve no employer to make any deductions on a regular basis does this mean I would have to be self employed and therefore pay additional Self Employment Taxes..............

My brain is spinning right now!!!!!!!!!!!!!!