It may take you a while longer than two weeks to get the meth out of your system. Until then it is just impossible to separate behavior that is caused by an illegal chemical and those produced by the brain of someone with bipolar disorder.
You keep working hard at clearing out the meth and with getting a good nutritional balance in your body with your food intake before looking at things like Bipolar disorder, ok? It'll be alot more clear if you do have it then.
May I ask how old you are and when you first noticed the highs & lows?
Please keep working hard on staying clean! You should really be patting yourself on the back every single night when you go to sleep. You're doing a really hard thing and you are also one smart cookie for looking us up here!!!
Whether or not you are bipolar would you come back here and let us know how you're doing??