I definitely think you are hyomanic-the racing thoughts and irritability and impulsive buying are red flags. I have experienced the same problems, and finally had enough sense to cut up my credit cards, and now use cash or my check card only. Reach out to your husband or friends and tell them what you are up to, before you get in too deep.
A few years ago I impulsively purchased $70,000.00 worth of jewelry over the jewelry channel--told no one because of my shame for a long time, then I I finally told my family.