February and March have been my worst months these past 4 winters while I've been ill. I'm ill year round but those months are bad; SAD is part of my symptom mix. Maybe it is part of yours too. While you are working on getting rid of the mercury, maybe you could make an effort to get lots of sun on days when it's out. Or you could try doing some light therapy. It was sunny here today and I certainly feel better this evening -- a good dose of sun really seems to help me. Shame we can't bottle it up in the summer and use it whenever we need it.