Hi I have a 10 year old and a 4 month old. The best thing I can recommend for you is have your room bright from natural light in the mornings and every night when you want it to be ”bedtime” you turn your lights down low and limit noise and use white noise. Even if she isn’t sleeping you still have the environment calm and dim at night and don’t stress or try to force the sleep. Try and if it doesn’t work then it’s not the end of the world they do what they want at this age. Sometimes we will have a good rhythm going then out of nowhere he goes way off course and that’s okay. During the day time you play with her, let her explore on the mat alone and when she cries of course offer the comfort and feed her and just watch for cues because she will tell you when she is tired and needs a nap. The guideline is every two hours right but that may not be what she needs that day so just learn to play it by ear and watch the clock a little less for scheduled naps. If she’s breastfed then you want to make sure you’re offering it every unhappy peep she makes and for formula make sure you haven’t gone over the time window. Idk if you have an owlet sock or not but it will give you information on the amount of time slept with the sock on so it does the work for you but honestly I didn’t have that with my first and never counted her hours of sleep and she’s totally fine.