 [ Symptoms ] i am having signs of early pregnancy my last cycle started dec 23 and ended dec 30 it is jan 14 do not know if i got a false neg due to taking allergy meds i take 2 different type of allergy meds i do not know if i should call the gyno [ Disease ] your allergy medications will not influence a pregnancy test but a pregnancy test taken very early could definitely be a false negative you can repeat the test weekly for a while or have your gynecologist order a more sensitive blood pregnancy test