My son is 21 months & has never been the best sleeper but after controlled crying we got into a good routine where he self settled in his cot. The past month he has suddenly stopped doing this. He will scream hysterically for hours at nap time & bed time before eventually I just give in and put him in bed with me. But nap times are even harder, I've started having to go out in the car with him to get him to have an hour. Today I'm not well so don't want to go anywhere but it's 12.30 (usual nap time) and he's wild. Tried everything to get him to sleep. I really don't know what to do anymore. I'm pregnant so need to get this sorted before the newborn arrives. Please help