@charlotte989875 I just realized you're at the 4 month mark - that sleep regression is no joke. I had B sleeping well and then the 4 month regression blew it all out of the water and it was over a month before I got him back on track with hard core sleep training because i was falling apart.
DS is home for the rest of the week due to exposure. It was a teacher in his room - a sub I think - but the last date of exposure was Mon or Tues last week so thankfully only home the rest of this week.