Should i test?

My husband and I went on vacation for a full week a couple of weeks ago. It was in theory just past ovulation but my cycle is pretty unpredictable. With two kids and limited time and places, we couldn't use our regular withdrawal method and decided since it was after ovulation it was safe to just go inside. Fast forward to now, I'm on day 7 (normally don't go past 4 days) of a very light and watery period without any clots which started a few days early. I highly doubt implantation bleeding would/could go that long, but given the strange consistency of the period, the fact it started early, and our lack of birth control I'm not sure what to think. If you were in my shoes, would you test or just assume it's a regular albeit abnormal period? I can't get a test either way until tomorrow night and don't want to drive myself nuts!