As the others have said, it's fine to keep bfing. You will pass on antibodies to protect him through your milk. Tummy bugs can't pass through milk, but he can still pick it up from you by touch etc, so it's important to keep washing your hands frequently.

Elliot is still little, but if you can figure it out, feeding while lying down might help you to get through this.

I hope you feel better soon hun, tummy bugs really suck