I felt so depressed today and watched movies all day after i measured my body temp it was 37.7 c, could it be from depression or staying in bed?

The temp isn't bad-: (99.86 f). . How about getting out of bed and doing something. If you engange in something productive it can help. If you are not physically ill - would encourage you to get some physical activity - even if it is a short walk. The depressed mood could be related to staying in bed all day. If you have other signs of depression and this has been going on for a while - then depression is possible.

No: I would take temperature elevation in non menstruating a little more seriously, if temperature did not come down.