My cycle is 24 days , january 28 lmp and feb 6th hcg10iu trigger,feb 8th iui done ,letrozole 7.5 mg from cycle 3to 7 ,till now no period only legs pain my period is due for 14days today i got spotted very very light like 3 drops of very light brown .

No actual question: But, a urine pregnancy test gives a reliable result 3 weeks after sex or insemination, or 1 week after missing a period. If done sooner, a positive result is likely real but a negative result may be due to testing too soon, and thus lead to a repeat test. After IUI, one can forget about sperm, eggs, or babies, and just enjoy everything else in life for the next 3 weeks. Then do a pregnancy test.