Baby was sleeping perfectly and now it's going down hill again?

oh geez now what to do. She used to pull all nighters (she's just over 3 months), then got in a solid pattern of ping out at 3am no matter what we tried, (schedules and routines, just letting her do as she pleased and hopefully work herself out of it, waking her early in the morning, you name it we tried it. It took traveling 11 hours away with a plane ride and her entire life changing around her for a week to visit family to reset her and she changed to sleeping from 8:30pm to 7:30am, with only 1 wake up. Now she won't fall asleep easily screaming bloody murder, pes out much later, wakes more often, and much earlier and is trying to compensate by napping more during the day. Does anyone have a theory as to why the change? If you were me would you wake her from naps during the day (when I do this she screams and cries for a very long time). Just want to hear what other mothers would decide to do to try to get the sleeping back on track. (she slept perfectly for about a month, now it's bad again)