My baby is 8 weeks old and she is having a sleep regression. During daytime, It is impossible to get her to sleep for more than 5 minutes and it is hard to put her back to sleep. Also, She is now not sleeping during the night and wakes up every 20-25 minutes. I have tried everything (putting her in dark room, 6Ss, controlling her wake windows and avoiding overstimulation). Nothing i do seems to work. Any advice? Also, if you have experienced the same, how long does this sleep regression last?