My baby is 2.5 months old . Sometimes her sleeping pattern is unusual She sleeps at 11:30pm while feeding and sleeps for long stretch hours like 5-8 hours and doesn’t wake up for feed . Even if I wake her up for the feed she is not greeting up and If by chance she is up she will feed for 5-6 min and will get back to deep sleep I tried tickling her , I tried flickering her foot but no response What could be the reason and can such a small baby sleep for this much hours ? How to wake her up and make her feed ?