There’s no fucking way

My sons only 6 months. I had protected PROTECTED sex once yall🤦🏽‍♀️ 3 days before my period, and im 9 days late, im exhausted, I feel nauseous now. Ain’t no way. Seriously, I took 2 tests they said negative a day ago, I haven’t been thinking about it so I know I’m not placebo effecting my head with this nausea. Tell me my chances or give me advice, please tell me I’m not 🥴 help.

Sn: my period has been regular since 3 months pp