Our 2.4yr old ds has recently started biting his nails and toenails despite them being cut short. The crèche he is at has expressed concern. For the past 2 weeks or so he has also full on hit the terrible 2 stage with regular tantrums etc Hê is struggling more to fall asleep at night and during the day as well- today creche said he struggled to sleep and only did once he put his blanket over his head and they patted his bum. We have noticed the same at home. Any suggestions?