BF advice

My LO is 8 days old. She usually eats every 2 to 2 and a half hours and never cries to let me know she's hungry, I always have to wake her. But today she's eaten every 45 min to an hour and a half. Sometimes she eats from one breast and sometimes she eats from both and it's been that way since day 1. Is this normal though? I'm getting exhausted from it and my breasts don't feel as full as they normally do either. Any input is appreciated. Thanks