Possibly pregnant?

CarolAnn • I`m CarolAnn 24, never had trouble ttc until last year. Idk y it`s problematic now but I`m not gonna give up.
I have normal cycle it's like clockwork. Well, I am two-three days past the expected start date and still no period. I took a cheap test ($1) and it came out negative. Do you think I tested too soon? When should I test again? Recommended test brand? And how much should I look to pay for it?