Hi @seahorse
Welcome the Forums.
Sounds like you're both you and your son are managing quite a bit. Can I ask if the behaviours you've described are out of character for your son?
Perhaps I can point out a few discussions on here that might be useful for you.
@Louise also has a teenage son who has bipolar. From what I've read of her posts, her son has improved with treatment - perhaps she can give some advice? You can also read and contribute to her discussion thread, which you can find here.
@Rebecca similarly has a son with bipolar. You can read more about her story here.
I also realise that you might not have had a chance to have a look at the Community Guidelines, so I just want to let flag that we're not able to discuss the specifics of medication on here. It's because people can have very different reactions to medication so we encourage people to chat to their health professionals about specifics about meds. Speaking about medication very generally is ok though. 
Hope to see more of you on the Forums!