Clearblue digi with weeks

I'm currently two days late on my period got a negative on a cheap test this morning. My question is for these to be able to detect 1-2 weeks along would it be sensitive enough for me to use now? Last time around I was about 5 weeks before I got bfp and it was on these I'm just not real sure how the calculations work for all this... so if I took one now could it be accurate