Good luck, and I would say as long as you don't think you are going to make others sick around you and you don't feel too terrible, go for it.
I had an international trip from Bahrain - Manila this past September and I was SICK. I had a small window of time off from work and if I didn't go then I would have missed it. I went and recovered when I got to the PI and staying in my hotel room for 2 days. In retrospect I don't think flying made me any sicker necessarily but it wasn't a MR and I wanted to get there. Thus if I was that sick and it was MR I would have packed it in and paid the change fee.