I had a similar experience. I was diagnosed late winter/early spring, hospitalized for a week and house-bound for a month. Almost a year to the day later, I was back in the ER (Valentine's day, as a matter of fact). I've heard theories about
a connection to SAD, seasonal allergies and holiday indulgences.
For what it's worth, I did feel very susceptible to SAD, even though I live in the South. I've always hated the short daylight hours of late fall, winter and early spring. about the time we go off daylight saving time, I pull out my full-spectrum lightbox and set it up on the dining table. I eat breakfast and dinner (about 30 min. each) in front of it and it does improve my spirits. I haven't had any major flares since using it, but I do alot of other supportive things, too, like dietary changes, taking probiotics and taking natural supplements.