Hi K.!
Well, I am a mom that KNEW the difference between what the Pediatrician said, and what I allowed to happen as far as co-sleeping. I didn't mind letting my boys sleep with me until they were ready not to. But you need to know that if this is what you choose to do, then it could be up to 4-6 years for your son to go back to his own bed gracefully.
Otherwise, you can break the habit now, while he's at an age where he can still learn to fall asleep on his own with a little patience and consistency.
I think it's up to you, not a Dr. I don't think there is a wrong way to go. But because he's 6 mos., now is a good time to make that decision one way or the other.
K., when our kids are sick we have all done things to create security, and sometimes a habit for awhile. Don't feel guilty about it, it's normal. Just know that everytime you do things like that, it can soemtimes take a few weeks (at the most) to "get back to normal".
You sound like a wonderful mother :o) Your little one is lucky to have you!
~N. :o)