The other day I was standing with my weight on my right leg and I vaguely remember feeling something shift or "pop" but I took no notice as it felt like an everyday internal sensation. Yesterday I walked 5+ miles quite quickly and found my right hip was sore and sensitive to footfalls but I ignored it as a random ache or pain. After I got home and sat down I found my hip really hurt when I stood up again, and since then it has been sore to walk on but mostly hurts when I engage my hip muscles. This morning I found a smallish painless lump in my groin, at the front and exactly on the seam between my leg and my abdomen, as if something has popped out and caused rubbing in my hip. I'm male and 23.

Any advice would be appreciated. Am I going to need surgery?