Oh big hugs, hun, I really hope it passes as quickly as it came on!! I'm not an expert but I'm pretty sure Concord will be fine, babe, I vividly recall coming down with a really savage bout of flu when Hayley was a few weeks old, I was literally bedridden for four days, had liquid coming out both ends (lol sorry for the TMI but thought it was relevant), couldn't sit up without vomiting etc etc... and DH just tucked Hayley in bed with me and we just slept and fed (well, she fed, I struggled to keep down enough water to keep a supply going) for a few days, H seemed to be totally fine (just got bored from being stuck in the bedroom with me constantly lol). I was really scared of having her in bed with me, I thought for sure she would get sick either from being near me, or by getting germs through my milk, but she was totally okay - no temps, no spews, no sign of anything other than a content bub having lots of snuggle time with mummy!
Hope you feel much better soon sweetie!