Wait a minute

Can a baby go through the 4 month sleep regression twice?! lol

I have a 16 week old and he went through more frequent awakenings overnight and crap naps during the day a few weeks ago. More recently, he has been sleeping 5-7.5 hours straight overnight before waking up for feed and his naps have gotten significantly better, but the last two nights he went to bed at 8:30, wakes up at 11:30 and 3:30 and it’s the same time every night now!!!

Maybe it’s teething?! Idk but anyone with any insight let me know what you think