I highly recommend going blood, I used to be frost tank as well, but blood spec is awesome. Either way, you should respec.
Heres a good frost tank spec. (2 handed)
Heres a good frost Dual Wield spec
and Heres a good blood tank spec.
I also recommend you making macro for each and every damage spell you use, and add /cast !rune strike to it, ie.
or adding a addon (Event Alert or Power Auras) telling you when u got the proc on, for the addon, make sure to also add the Killing Machine and Rime procs to it, so you can easily track when they are on and when to use (ie. save rime for when KM is on, use frost strike when KM is on)
#showtoolip Icy Touch
/cast !Rune Strike
/cast Icy Touch
frost is fun and still doable, although DW frost tank might be better now, but you will like blood more after a while. Try it out.