any help would be appriciated n yes i do go to wowhead
If you have ran out of quests in Badlands, I think you can continue to Searing Gorge for more. They might require level 48, though, so Tanaris and Felwood are good options, too (both in Kalimdor).
Northrend quests (Wrath of the Lich King) will be available when you reach level 68 (you can also buy Coldweather Flying at this point, which you'll need if you want to fly in Northrend). Northrend has two starting zones; Borean Tundra and Howling Fjord. You get to Borean Tundra by taking a boat in Stormwind Harbor (4th dock?). You get to Howling Fjord by taking a boat in Menethil Harbor in the Wetlands (Eastern Kingdoms) if my memory serves me right.
Cataclysm quests will be available when you reach level 80. Upon reaching level 80 you get an automatic quest that tells you to go to Stormwind, it will also provide you with a one-time hearthstone to Stormwind. Cataclysm also has two starting zones; Vash'ir and Mount Hyjal. You can reach Vash'ir by taking a quest at the Call to Arms board and boarding the ship in the follow-up quest. You reach Mount Hyjal via a quest in Stormwind Keep.