Coolant Leak???

I think I might have a coolant leak. I had my timing cover leaking in Nov so I did that job (what a mess wont do that again). Now tho when i Hammer it and have the car pretty warm and I look behind me i can still see white smoke coming out my tail pipes and up above my hatch. My oil isnt milky so were else could it be leaking from. Im gona do the t/b gasket to make sure.

Also my idle is way off could this cause the white smoke? And when i turn my defrost on there is a cloud of steam at frist which i think means my heater core is going out could this cause the white smoke also?

Thanks in advance,
Black 93 Fox

This even does it when im just driving around town..If im stoped at a light it still does it.