I've been on the same pills for about 15years now and this is one of the few times I can ever remember spotting. I'm on week 3 and it's been going on for 3 days now, sometimes heavier than others. Some light cramping. Last month I did mess up my pills and got my period a few days late so I'm wondering if this is maybe a residual side effect of that screw up? My husband and I use condoms, except in the shower, where he pulls out, so I'm guessing my odds for pregnancy are fairly low. Any insight is appreciated.