First post here... this is maybe gonna sound weird, but hear me out?

I've noticed a trend. It's not a fun trend, but it seems to happen every year, and I'm wondering if this resonates for anyone else. Every Fall, usually around the time when Daylight Savings ends and our clocks switch back by one hour, I start getting nauseous every single morning. Come December, I frequently vomit in the morning upon waking, and then I'm generally ok for the day. "OK for the day" meaning only dealing with mild (but nonetheless ever-fucking-present) anxiety/nausea throughout the day. Every year, I take a break from coffee for a month or two, because I simply can't stomach it and know it only makes my anxiety worse.

I'm trying to figure out if this is just garden-variety seasonal anxiety causing the nausea, or if it's perhaps related to the lower light levels outdoors this time of year? Or something else entirely? I do take escitalopram 20mg every evening, but I've been on it for months and wasn't anxious or nauseous prior to a few weeks ago.

Does this resonate for anyone? Is this a Thing or am I just having a month-long, low-grade panic attack? Good times!