I work at home too, so know how precious nap time is! Going thru my own nap frenzies right now, so totally can relate!
It doesn't sound like she's ready to drop, since she still will sleep during a buggy ride. I'm guessing timing is off. You may have moved it too late all at once -- so instead of moving 45 minutes later, try 15-30 minutes and see if that works first.
Also, this might sound crazy, but you may even need to try about 15 minutes *earlier*. If 2 year molars are starting to bug her, they may be making her more tired, and so she needs and earlier nap. In other words, she's OT by the time you're taking her in for nap so she plays and overshoots her sleep window. My son will be 3 in 2 weeks and after over a year of 5 hour A times, he now can't do more than 4.5 before nap AND after nap. Crazy.