Yesterday, I found my daughter sucking her thumb for the first time. My son never sucked his thumb but my daughter liked to suck since she was born. It just took her 3 months to finally find her thumb.
An update on the sleep situation... she went down at 7pm last night, did a dream feed at 11pm, woke up at 4am and 6am. 9 hours of sleep is not bad except that I didn't sleep at 7pm.