ahhh, sorry to pry! It is possible, you know, to keep up two feeds am/pm even when you're back at work (depending on your work of course). I know how hard it is to plan it all in and think about how you/LO will cope but if you need any advice there, I am here for you as I was back in work at 4.5 and 7.5 mths, albeit an easy workday for fitting in feeds (did 7am feed, left and worked 7.30am to 3pm with a half hour unpaid break and an hour breastfeeding paid break so left an hour early and got home for 3.30pm for a feed).
Just stick to your plan, though, and see how LO does re. switching from breast to bottle and, more importantly, back again as you don't want to get engorged at this stage of the game. The only time I had a fever was when I went back to work after Ozzie at 4mths and didn't pump enough/spend a long enough time pumping.
Good luck today x