False positive

Two weeks ago I took clear blue and it came out pregnant. Was so excited!! Later in the day I took first response and had a faint line. The next morning I took another first response and it was darker than the one before. Went to the doctors and their urine test came out negative. Did bloodwork and the next day it came out negative too. My boyfriend and I are sooo upset, but we’ll try again. Anyone else had this happen??