Am i bipolar? or something?

my friends say im bipolar i have mood swings like all the time i can be happy and laughing one minute and the next im yelling at soemone for calling my name more than once my friends are getting really tired of it and suggest that i hould go to the doctor and find out but i just want to make sure htis is enough becuz i dont want to waste a trip and di i mention i cried at spongebob movie and the trix commercials why wont they just let him have his trix whhhhhy