Chiropractor twice a week excessive?

My OBGYN referred me to a chiropractor regarding my back and pelvic pain which effects me most when I sleep (although I am definitely able to still sleep - its just when I wake up throughout the night I feel pain in my pelvis mostly) and also effects me doing minor household things. It’s not so severe that I can’t do these things but it does make doing them more painful. I went to the chiro for the first time last week and it actually really did make a difference. He said he’d suggest me coming in twice a week this late in my pregnancy (I’m 36+1 today) because of the relaxin hormone basically undoing the work he’s done. The unfortunate thing is I haven’t met my deductible yet and so the cost will add up quickly which sort of deters me from going twice a week. I was thinking more along the lines of once a week. Anyone have similar experience?

For the poll I’m asking:

Is going to the chiropractor twice a week excessive?