yeah, you need to test. go to the next town, or get a friend to buy it for you. i know how you feel, i am 24 and have 2 boys, anytime i'm late, i worry and am embarassed to buy a test, i make my husband buy one. hey, now you can even order them over the internet. it is suppose to be discrete. (sp?) maybe you could do that.
but that's the only way you will know for sure.
good luck and keep us posted.