Today i passed an important exam. i'm so happy that i can't stay.now i can't rest, relax.in july i had ipomania.is now the beginning of a new episode?

Not necessarily: If your treatment for hypomania last summer taught you strategies, you can use them again - even if this is merely normal excitement and happiness. If it didn't - this might be a good opportunity to seek cbt talk therapy to learn skills for times in your life that your success is so great that it makes you too happy for your own good ;-) congratulations!