Sleep Cycles 8 weeks old

Br

My LO has been completely thrown off sleep wise. She was a good napper and definetly almost slept through the night. She used to sleep from 7 till 3:30 am with a dream feed. Now that she is 8 weeks old she cant seem to transition between sleep cycles on her own. She wakes every 45 minutes upset because she is tired. She is not hungry or wet. Everything seems to be just fine except for that she is exhausted.

Anyway I can help transition between sleep cycles? I use white noise, swaddling, blackout curtains. Pacifier and no pacifier. Im not sure what else to try but it has been a long week of no really good sleep for the both of us.

Help.