I would contact your physician to let them know of these new side effects you are having. I had the same symptoms you describe in addition to headaches, after getting Depo provera (Depo) injections, and because of it, decided not to continue. I understand how really uncomfotable these symptoms are and I hope they will go away for you soon.
Researching and looking up Depo might help to know more about it, because to increase the frequency of the injections may be something you want to reconsider if you are having side effects and may need to consider another method. I also have found that drugs with the same stabilizing properties as Trileptal also interfere with pills and other birth control treatments, like Depo. It can be hard to find the right balance but worth finding, just takes some time and patience, which can be hard to come by in dealing with this but HANG IN THERE! The right combo is out there for you if it means the Depo shots just need to be tweaked a bit or something else all together!
Meanwhile, contact your physician to let them know what is going on; it will help them to help you find the best course of action for your care.
Best wishes!