I think rather than asking about spoofing, you'd be better telling us what's happened.
I could spoof your mail address quite easily, if I knew it. Hacking is another level completely. There are ways of verifying if a mail has been spoofed or been hacked. So if you need help it's best not to be too cagey about it. We'll put your mind at rest if we can or help you if need it.
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