Hi. I'm Brian and I'll try to help.
While the messages appear to come from you, they obviously don't. Your address is known to scammers and they are also using your address as the From address, which is easy to do. The scam you describe is a common scam and you should ignore it. Do not be worried. Are the messages arriving in your Junk Email folder? If so, they're considered blocked and they'll be removed automatically in from 10 to 30 days.