How do I deal with depression and pregnancy..

I'm affected by SAD and being pregnant makes me feel a million times worse. I've slept so much, snapped at loved ones and am barely able to get out of bed. My patient is so thin I feel terrible about it.

I hate bright lights because it hurts my eyes and maybe I just need new glasses but idk ... I get headaches and it makes me feel even worse..

How can I help stop this. I have an appointment on the 26th and am going to mention it but until then I just feel miserable.. Im sad and I cry all the time..