Does anyone here ever have mood swings,I have them sometimes, and
my parents only think that they are only temper tantrums,It's got to be
something else because I have them every so often, I wonder if I
could be having a mood disorder of some sort.I may need to
take some kind of medicine to get rid of them.

yes

i'm cyclothymic.

Yes very often too.

It's so weird because I have mood swings and insomnia,and neither
ever seems to go away,I hope I don't have a mental illness. :(

It's so weird because I have mood swings and insomnia,and neither
ever seems to go away,I hope I don't have a mental illness. :(
i doubt you do, how old areyou?

It's so weird because I have mood swings and insomnia,and neither
ever seems to go away,I hope I don't have a mental illness. :(

You probably just have depression, or maybe you're bi-polar. If it really annoys you, maybe it would be worth seeing a doctor about.

Yes! All my life my parents have accused me of being bi-polar.My moods pretty much change like the wind.One minute I could be really happy,the next I can be really down in the dumps.But my mood changes when someone provokes it usually.Its not like it just happens

consider some things and then id recommend seeing someone- you can start with a family doctor who can refer you if needbe.
how long do each of your moods last?
how long have they been a problem?
are they drastic enough as to interfere with your daily life?
what other symptoms do you have? (such as insomnia, which often accompanies manic depression, weight gain/loss, eating habits, etc..)

another thing to consider is do you find your moods corresponding with certain times of year. They diagnosed me as cyclothymic when I was 14, then a couple years ago they reevaluated thinking i was bipolar and concluded that i had seasonal affective disorder as well, this just means that i get really depressed during the winter months.
a sun lamp and some time outside and im not such a wreck. ;)