At first my thumb began to swell and a few days later it looked like a pus filled ball. so i popped it and now my cuticle is detached from my skin, if that makes sense. about how long will it take for my skin to reattach?

Paronychia: Most likely you have paronychia -- that's the medical term for infection of a finger involving the fingernail. It often results from an ingrown nail, sometimes because of improper nail trimming. Healing may take several weeks. It would have been best to see a doctor without popping it yourself. You still should see a doctor now, maybe antibiotic needed, and for advice to prevent future episodes.