So uncomfortable😔

So it’s the OHs dads birthday today , we are meant to be going for some food however they’ve arranged to walk around shops and the canals and all beforehand which I really don’t want to do being 36 weeks pregnant. I am in quite a lot of pain with my sciatica and have been having serious Braxton Hicks. My other half has kicked off at me and made me feel really guilty. Should I just grin and bear it even though it’s super painful?