Is it OK to go two days instead of three between chelation rounds?

I feel desperate tonight. As soon as the sun goes down, I "yuck out." Can't concentrate, don't want to be around anyone, feel tearful and anxious. And very tired. I remember my first winter of SAD, it started like this. Light therapy helped. I can't do light therapy now. I have been trying to keep a balanced perspective, but the fear in me is rising that if this is how I feel now, how will I feel in 5 months?

I'm going to order some melatonin, see if taking some helps when I wake in the night. But spending hours each evening in this state is awful. I can't believe the time change has affected me so profoundly. <img src="/ubbthreads/images/graemlins/cry.gif" alt="" />