6 week old not sleeping and causing me depression

My girl is 6 weeks tomorrow and for the past couple weeks she has been falling asleep around 5 an the waking every 5-20 minutes until around 12 pm. Then she’ll sleep for an hour at a time until around 3. Then she’ll stay up with a couple short naps until around 8 then she’s up until 5 am. The past few days she’s only been falling asleep on my boob also. Literally no amount of rocking, swaddling, white noise, shushing gets her to sleep. She eats a lot also. And the rooms dark at night, bright during the day. I’ve even tried flipping her around 🤷🏽‍♀️ I can tell she’s tired but she refuses to sleep. No sleep is making me extremely depressed so any advice would be great!!!