Help! is my preg test positive?

Ok so on 5/17/08 i had a m/c with a d &C..i was 6.5 weeks pregnant... on 6/16/08, i took a preg test that showed a faint positive, i have been peeing on sticks like crazy since then and they all came up positive, some darker than others...this morning i took an early response preg test that came out positive, and then tonite i took 2 "answer early detection" tests and both had very very faint positives, fainter than the test from this morning, could this b/c my urine was diluted? the reason i am unsure of whether or not im preg or not is b/c im worried the HCG the test is detecting is from the miscarriage...i know the only way to know for sure is to go to the dr to get blood taken, i'm just wondering in the meantime if you guys think this is a new pregnancy, or leftover hormones from my miscarriage?