cycle

Hi Dr.Q,

My average cycle length is 30-33 days.My last Lmp is nov18th ,i got a positive faint line on dec16th(cd29-first sample)and got a very very faint line today(i didn't test today with the first sample).Can i take this as a positive result or should i wait up to 33rd day? This is my second IUI...i got an injection to control implantation failure on dec12th and dec16th..Occasionally i get cramps which is similar to AF cramps,this makes me really frustrating..please guide me.Thanks in advance...