Didn't have period for 10m b4 bc.on bc 5y.off bc 3m.2m no period.2w ago had neg preg test.2pos test today.cramps&very min. spotting.could be chemical?

Your question???: RU asking if there's some reason besides pregnancy that could cause a positive pregnancy test? If so, it's unlikely but possible, OTC pregnancy tests are pretty specific for the hormone HCG which is secreted by the placenta. Sometimes a placenta forms even if there's no embryo or after an embryo dies. In any case, you should see a doctor after having 2 positive pregnancy tests. Best wishes.