Implamentation bleeding? Spotting?

So, just curious if i should re test.. or wait the week out to see if it gets heavier .. i tested a few days ago with one coming up slightly positive but when i took some others they're negative. Well, fast forward a few days a go and i thought AF showed. Im a little nervous to if only to be left disappointed. However, its been 24 hours and its not been heavy enough to soak through.. last time this happened i had my 9 month old! So im wondering: is this just a light period or perhaps implantation bleeding? Please let me know! Anyone else had some similar experience?