concerns about the future

i woke up this morning with the same concerns... uni.
i realise.. i have some personal issues.. actually, i'm just afraid of the future.
i'm really falling in love with linguistics and lultilinguistics. seriously. english, sentence structure and everything..
its just that my future would be blurred. what happens if i suddenly feel like doing science? i won't be able to do that would i if i major in language. =X
but.. would i be able to excel in science? with my grades? i don't know if i can even enter uni.. really.
i've been just neglecting my grades and thinking that i can apply.. i don't know. my parents think i can make it.
science course.. what if i cannot cope?
what will happen to my minors? i really want that linguistics course..
i don't know.
do what you love. all my friends say that. why are they able to chart their paths that easily?
why are they able to say 'i'm an arts person' or 'material enginnering' or 'computing i like it' or 'business is what i want' why can't i do that?
do what i like. i don't know.. then there's the career prospect to think about. i don't know. i didn't sit down and discuss it with anyone yet. it's just scattered thoughts here and there.
all my friends say. i have to decide for myself. i know. i have to. but till i figure out if i'm willing to take the risk... i would still be plummented into disrray for this few days.
i have it thought out.. but i just need to talk it over again with someone.. i guess.
:)
=do something right=