5 weeks and lines not progressing!

Jenny
Hi! 
I have been obsessively POAS everyday since I found out a week ago. I am using those really cheap sticks from the Internet. I noticed my line got fairly dark around 12 DPO and in the last week it hasn't gotten any darker, if anything it's a bit fainter! I won't be seeing my doctor until week 7. Anyone have this happen and everything was fine? I have one weekly estimator which I will try in the next few days, but after that I think no more POAS for me.