Vagina lump??!

Whilst shaving down below, I found quite a big lump on the outside of my vagina by the top of my thigh. It's quite a hard lump that hurts to touch and it has bled twice when I've gone to check it. I've had this lump for about a month now and it's not gone down. I thought maybe it might be an ingrown hair but there's no mark on the skin. Help??!