Was right there with you yesturday and the day before. If you were stable before, it came on quickly and you are still taking your medication it will most likely pass. I get these occasional blips/hypomanic spikes, that often last less than a week, but can be very stressful and draining because they come on unexpected. The best thing right now is to get control of your thoughts. The thing about (hypo)mania that makes it hard for me to sleep is my thoughts going in 50 directions at a time. Try to direct your focus on one monotone thing at a time, such as your breathing, you will find that this will calm you down a bit and make it easier to sleep. With better sleep your mood should go down a few notches. If it still doesn't after a few days, please get in touch with your pschiatrist ASAP.