Hi bismarck,
Why quarrel with your mum?? But anyway, you had two different
dreams.. Dreams are created sometimes when one person is too stress
or things that influence them during the day. 
The x-men show is always advertise on TV and ppl have been toking
about it.. even here in the forum.. So my guess is that you tend to
dream of it cos of the surrounding.. nothing much on this dream..
maybe you should go watch it!
As for the second one...
Friends
Our dreams are full of symbolism with their messengers being all
different types of people. It is very common to dream about our
friends. These are individual that are emotionally valuable to us
and we learn about ourselves through them. Dreams are very rarely
prophetic, thus whether your dream was good or bad, don't expect it
to come true. This dream is more than likely attempting to bring up
uncomfortable feelings that you have about yourself or others.
(Remember "uncomfortable" does not necessarily mean bad.) Dreams
are created by our own thinking processes, our own thoughts
(conscious or unconscious) create dreams, thus, the mind that
created the dream also knows its meaning!!!
It also signifies aspects of your personality that you have
rejected, but are ready to integrate these rejected part of
yourself. Additionally, this symbol foretells of happy tidings from
them and the arrival of good news. 
Hmm... dont worry that much on your exams.. Its giving stress.. try
to relax more.. It tells you that you be receiving good news.. so
don't worry too much.. 
Well, good luck for your exams.. ANd hope you can score well for
it!!! Try to sleep early and dun study till so late... And before
exasm starts.. Eat some chocolate or sweets.. It does help
alittle.. 
