At 90 days, while I was not using my donut per se, I did not feel comfortable on wooden or un padded plastic chairs for any length of time, and had a small plain pillow to put under one hip or the other as needed. My home upholstery is fairly new and very soft, so that worked ok. My greatest moment of relief was when the two stitches at the base of my vulva finally came out. If your doctor (who I got to meet at SCC) is worried, she probably has a reason, but for me there was one day I forgot to carefully choose my seating, and did not jump or scream by the middle of my 4th month.