late period..

Summer

i am now a full week late but at 4 days late started getting extreamly light spotting(so light its only on the toilet paper, or if i hold my pee for a long time it will then leak to the pad but always less than nickle in size) and frequent urge to go pee. but! heres the kicker i took one pregnancy test about 2 days ago and it came out a REALLY light positive and i havent done another one. my question is how long should i wait before taking another pregnancy test? or should i call the drs to see them?