Stella,
I was on IV Meropenem through a PICC line a number of years ago. It did a good job of knocking down my pseudomonas but apparently didn't totally get rid of it because I've had five PICC lines total. Cefapime, Zosyn, etc. At some point the pseudomonas became colonized into the mucoid form. When I went to NJH last year, they started me on inhaled Tobramycin 2 weeks on/off. My voice has been an issue but the ENT put me on Nystatin for a week during the Tobi and I also nebulize 0.9% saline after the Tobi as a vocal rinse. My voice is still raspy after two weeks but recovers pretty quickly.
I think going to an ID doctor is wise. The ones I have seen over the last decade know much more about antibiotic administration and their side effects than the pulmonolgists.
I hope you feel better soon!
Jennifer