Pregnant or not

Brittany • Hi I`m brittany I`m 18 and I`m studying childcare I live work with children and can`t wait to have my own. And also I run a page on facebook called helping hands in Christchurch New Zealand
Hi I don't have the money to buy a pregnancy test at the moment I have missed my period for a week Now I feel so nauseous and am having like tiny cramps but different to period cramps any have any idea