My son is 16 months old but for the last week and a half has been a NIGHTMARE at night. First day or 2 waking at 5am, next 3 days 4am and it's been around 3am since! He refuses to go back to sleep for 2-3 hours and I'm exhausted! I'm pregnant too so I just feel like im getting no sleep at all. He has 1 nap during the day and has done since he was 12 months. PLEASE somebody tell me this gets better because I'm at my wits end and not sleeping is making me feel weak and poorly. How can I get him to sleep longer?