I got my first BFP after BFN at19 dpo.. though iit wasnt a sticky bean.......
so i guess its alright .. just hang in there and test after 2-3 days i m sure u will get see 2 LINES!!! ssbd*****SSBD***********SSBD!!!
It's not uncommon to get a BFN if you have tested too early. It also is not uncommong for women with regular cycles to have one "out of the ordinary" cycle once in awhile.
Though your cycles may normally be 28 days you still could have ovulated later meaning you either tested too early or it hasn't been long enough for your period to start. One way to be certain is to wait 2 weeks from the last time you had intercourse and test if your period still has not shown up.