This may not be grief, but it sounds a lot like the more physical symptoms of anxiety (surely an aspect of grief.) It may be worth checking in with a GP and getting it checked out- you may have a virus or something, or it may be anxiety related, but either way it's not something you just have to put up with.
I'm currently getting counselling for anxiety issues, and it's not until now that I've realised how long my symptoms have been going on for, and how insidious (and easy to ignore) they are. Doubtless you will feel better over time, but it may be that your symptoms just lessen, rather than actually resolve.
Sending you lots of healing hugs- take care of yourself. Emily
... View more