I would stay away from the ICs. The only thing they are good for is saving money if you if you feel the need to POAS every day! 5dpo is too early to get a line anyway (sorry to be blunt but implantation happens a few days after ov and then it takes a couple more days for HCG to be produced and get into urine). Even when my period was late I was barely getting a line on ICs even though CBD was saying 2-3 weeks and other tests showed a definite dark line. Try waiting a few days before testing again, even if you do get a BFP early, the wait until AF is due will drive you crazy. Good luck!