While people with bipolar commonly crash after a hypo/manic episode, crashing doesn't always happen. Moreover, crashing into a mixed state or a depressive state doesn't always involve sadness, which can make it difficult for us to determine if we're actually depressed or not. In the case there is no sadness involved, look for anhedonia.

Also, if we're manic and getting less sleep than normal, our bodies do need to recharge at some point. Recharging could be one reason we sleep more than usual.

Now ignore the sleep issues for a second -- can you elaborate on how you're feeling right now? Everything you're feeling. For example, "not motivated" or "stressed out"