Thank you for your response. I just wanted to make sure it is safe to keep trying.
You may have had an early miscarriage...or just a weird period (hormones can get out of whack and cause weird things to happen in your cycle). Without a confirmed pregnancy, no one can say for certain which you had (miscarriage or wonky period).
Generally though, a pregnancy test would have shown positive if you were pregnant. The hormone (hCG) that the test detects stays around for a least a few days even after a miscarriage.