Cross contamination from egg yolks is fine as the problem with yolks is their high fat content, so a tiny bit is fine really.
And I wouldn't worry about the grill to be honest! Although red meat is a problem b/c it's hard to digest as well as higher in fat, a trace amount of that shouldn't be a problem.
I answered the portein thing elsewhere...IMHO safe protein is fine.
REMEMBER that as a C you should cut IF out for a max of 3 days (then eating it safely of course)!!! I can't tell you when you'll feel better as everyone is different, C's often take longer to stabilise and bloating is often the hardest symptom to eradicate.