Please help

Hi everybody any help would be so appreciated!! My daughter has just turned 14 weeks! The last week her sleeping at night has gone horribly wrong! She was going to bed at 7pm and sleeping through till 1/2am then feeding every 3 hours till 7am which was lovely however she has been waking an hour earlier every night the last week and is now waking me every hour from around 10pm till 7am sometimes even every 40/50 for a feed!!!! My sanity cannot take it!! She is still sleepy at night and desperate to sleep around 7pm and she falls asleep easy during the night after these feeds but I cant understand why she’s waking up so frequently to feed! She has also started sleeping all day and wakes every 3-4 hours for a feed in the day and then doing this at night!! If anyone can help me please do!! She is exclusively breastfed x