Weird question... pallbearer while pregnant?

This is a weird question I never thought I’d have to ask. I’m 21 weeks pregnant. My grandfather passed away and his funeral is Monday. All of his grandkids will be pallbearers. The casket will be on wheels and no actual lifting is involved. It’s not unusual, at least in our family, for females to be pallbearers. Last year when my father passed away, my cousins (guys and girls) were the pallbearers. My uncle said he understood if I didn’t want to be a pallbearer while pregnant, even if no lifting is involved. He said I could walk with or behind them if I’d like but it wouldn’t upset anyone if I didn’t. I am for sure not going to be a pallbearer but I’m not sure about walking with or behind them/the casket. I had a close relationship with my grandfather and if I wasn’t pregnant it wouldn’t even be a question. But I have a very obvious bump and even though I am not superstitious, I feel like it would be badddd luck to walk with or near a casket while pregnant. The only thing holding me back from saying no to even that is the relationship I had with my granddad.