It sucks when your immune system is lowered - it's so hard to get better. Try to get plenty of rest and keep your fluids right up! As well - if you don't get better soon, get back to the doctor, you might need a little nudge. At about 34 weeks with my last bub I had bronchitis that wouldn't get better because of my suppressed immune system and I ended up needing penicillin injections - and it was worth them because I got better after that.

So that's my advice. If you don't get better soon, just get to a doctor again.