Can’t find babies heart on home fetal doppler!?????

ash

13w 2d Just tried for 15 minutes and couldn’t find it should I go in????? Should i be worried????? My bladder was empty so I’m drinking a ton of water now to push the baby up also I’m on the chubby side could that be making it harder??? Heart was fine 2 days ago at my appointment, it’s a Sonoline B

-please no comments about how they aren’t reccomended😴 I’m aware