Need second opinion regarding an infected/root canaled tooth

[tezarin]

Hi all, one of my teeth which was root canaled twice hurts (bottom jaw on the left) and I visited my dentist to get an X-Ray, The dentist said it got infected and gave me antibiotic. But she thinks I will most definitely need to get an implant as she thinks there is a crack showing up in the X-Ray. I was hoping I could get a second opinion by joining this group and see if you think the Amoxicillin antibiotic will hopefully get this issue resolved.