If you go to www.epinions.com you can read reviews of different HPTs. The CVS brand actually gets great reviews. You can also go to www.peeonastick.com for info about HPTs.
Thankyou for your answer I will wait until the weekend probably
You shuold always test the day after you miss your af. You can buy sensitive test and do it 4-5 days before af but you might run into chances of false negative and be upset about it. I test with First Response the day of AF and got the BFP. I also chart BBT so I'd know if af is coming.
Good luck!