will they terminate me?

Hello! I just signed my contract in ACN and I know that they are very strict sa bacground checking. I'm a fresh grad po and nag work ng isang araw sa isang malaking company (not bpo) and decided to not continue because of personal reasons na din. AWOL po ba ako nun? And yes po, nakapaghulog yung company sa philhealth ko, malalaman po ba ni ACN na i have a previous employer? Hindi ko po sakanila dinisclose since 1 day lang naman po pero if ever na tanungin ako willing po ako na magsulat ng explanation letter.

Asking for advice lang since nag ooverthink ako and I really need this job po talaga. Especially sa mga nasa ACN with same experience po saakin. I hope na masagot po! Thank you!