My 19 week old started waking up 3-4 times a night. Before it was 0-2 times. Last night she woke up crying uncontrollably one time. She's already woken up several times tonight, every few minutes, and it's not even 10. She just started crying uncontrollably at 9:30 but is sound asleep now. Often she startles awake when i lay her in the crib. Any ideas? She had her vaccines last week and I am currently using a travel crib since we just moved (though this started to a lesser extent the day before we left, not the crying but the waking). Also, maybe it could be gas? Thanks.