stressed

so im 9 days late, and worried cause my bf fingered me after he came- but he changed his clothes and said he washed his hands after. does anyone know the likeliness of getting pregnant if he fingered me w cum on his hands? anyway i took 2 tests and both were negative but ofc im still stressed cause where tf my period at, ya know? especially bc i woke up in the middle of the past two nights, and last night w this huge pain in my back. anyway. if u have any advice on how to destress, or if u have an idea of the probability of getting pregnant in my situation is pls let me know