My believe is that psychological and physical side of ourselves are very connected more then people often like to see.
I have problems with experiencing my emotions but they make sure to come out in some way or another. So I often have to deal with psychosomatic issues. If I talk about something that is particular hard for me I get sick and my back pain always gets me when I push myself too hard etc.
So yes if you are going through hard time mentally maybe your body is trying to make you rest and concentrate on one thing. If you are feeling really sad and emotional but still pushing some things down your body can express that too.

I would not rule anything out. If it doesn´t get better get to your doctor but mainly have few days off and have a rest you probably need very much.

Best wishes on your journey hope you feel better soon