Oh my. Let me just tell you, I'm sure I'm older than you, but wearing 4 inch heels would be impossible for me at this point! Those shoes sound dangerous! lol I think between the fall and wearing the 4 inch heels, your hip just said "heck no". Take some ibuprofen and stretch, walk (keep it moving) and see if it feels better and the pain is gone without coming back. If not, I think you need to get it checked. good luck