For a few weeks now, my 4 month old has been crying/screaming at around 10 at night just before she falls asleep. It lasts anywhere from 5-20 min. It's like she goes from 0 to 60 in 5 seconds. I've tried burping her, nursing her, giving her the pacifier, rocking her, singing, all to no avail. I think she may be overtired? She usually takes about 3-4 naps during the day that last 20-45 min. each. She has been teething for at least a month (none have come through yet). Thought about giving her tylenol. We give her frozen teething toys throughout the day and she has never acted like this during the day. Anyone been here before? TIA!