I am a late bloomer and only just played Fallout 3 last fall and then Fallout: New Vegas this winter. I downloaded 2 dlcs for F:NV and it raised my cap to 40. I have hit that level and am just waiting for payday so I can raise the cap again. Does any XP I earn if I played the game now just not exist at all, or will it roll over when I raise the cap? I want to play the game but have a lot of big quests left and don't want to miss out on the XP.