Have been spotting for 16days, had two blood pregnancy test but it is weakly positive.on du photon for 2weeks now could it be threatened abortion. ?

Repeat test: If this is bleeding in early pregnancy, all you can do now is perform a repeat pregnancy test or ultrasound in a week to see if you're still pregnant. If you miscarry, there may not be anything you can do if the pregnancy is early and is going to pass. Please see a doctor if you have a fever, severe bleeding or pain.

Yes: Weekly positive on two occasions means not so healthy pregnancy or pregnancy may have been lost do a sonogram.