Breastfeeding Question

As

So! My baby is now three months old. Our breastfeeding journey has been a struggle but we had finally got it down (I thought) around the one month mark.

Now, suddenly, she won't eat when I'm sitting up or standing. She will only eat when I'm laying down and she's also laying down, on her side, and all cuddled up. If I try to feed her any other way, she will scream bloody murder and cry and arch her back and stiffen out her legs and refuse the boob.

The only thing that's changed lately is that she's now teething. Is that what's causing this? Has anyone else gone through this? Will she eventually go back to eating normally? Or am I going to be stuck feeding her at home for the rest of the time that she's nursing?