DH has got a new job and is currently working his notice period. I work in a job with good holidays at set times, you cannot take days off outside this time. DCs primary school has just announced a mid term INSET day. DH usually takes a day off for this but can't as he's leaving and isn't entitled to any holiday in this period. Nearest family is 3hrs away and any friends work and will be farming their kids off to family. We have no one who can look after DC and I can't take a day off. AIBU to phone on sick that day??