if your stress level is that high, thats not good, could lead to things worse than insomnia, on the topic of you not dreaming, dreams are a very important part of proper cognitive functioning and without them certain problems may possibly arise, but you may be dreaming and just not remembering... i also wouldnt suggest that you start taking any sleep aids without seeking proffesional advice because they can carry some risk of dependency (needing to take them all the time to go to sleep) and that can be a much worse problem as well. My advice would be start eating healthier (if you aren't right now), avoid using your bed for things besides sleep, like eating, also if your a smoker avoid smoking before your going to bed, and also i would try if you are watching lots of tv while lying in bed b4 you go to sleep, possibly cut that out as well... if the insomnia problem persists and is starting to impact your sleep severely then i would go set up an apointment with a sleep specialist/ school counselor, they should be able to help you figure it out, this stage of insomnia you are experiencing could pass though ... hope that dvice helps, it has helped me before, it is hard though to help give proper advice over a forum without knowing all the facts of your recent behaviors... i hope you start getting some much needed zzz's :)