Has a home paternity test ever been wrong???

Currently took a dna test but with my daughter in the NICU I’m not sure with how much medication she’s been on and her ventilator that it could’ve had something to do with the results being negative and espeidallt bevause i sent in a swab for myself as well. Everyone says that the dad and her look alike same nose and everything and the timeline always added it up and no before you guys assume i did not cheat on him during the time i mustve conceived we were broke up but me and him where still having sex but there was only one guy i saw but i don’t recall having sex with him because i was blacked out and I’m just finding out that he must’ve taking advantaged of me that night