Suggest Remedy For Delay In Period

hi sir , i m from vizag. i m sufering from infertility. i m under treatment and having tab.clofert, inj. humog and tab. duphaston .this is my third cycle after visiting doctor. i got period on 27 aug, 28 sep ,and 29 oct. this month 1 dec probable time for my period but still it did not dtarted. today (4 dec) i have done my home pregnancy test by(dr . redddy's pregnancy kit) but it shown negative. what shoul di do now. early i have done all test done like hsg, thyroid, laproscopy. all result shows ok. also seamen anlysis also fone . now pls u sugest me what to do now i my preiod not yet come. should i wait for some more days or should i doblood test