My husband and I are tryingto concive so we have ben doing the ovulation test. We had sex before the possitive and after the possitive and the day before I got my period. I usually have heavy bleading that last from 7-10 days and this period was 4 days and very light.

You could either try a test now or wait and see what happens when your next period is due. Some women will have some bleeding in early pregnancy thinking it is their period, or it could also just be an off period.