hi i have pcos and i dont know when i get my periods . i think i could be preganant i have been feeling sick and when i eat it makes me feel sick . and about 2 mounths ago i had brown spotting and then a few weeks ago i had a bit of spotting but not brown and it was only a day . what could this all meen and if i could be preganant what test should i take as i not know when my missed period is?