Welcome to HCM,,
Your partner had period on Feb 15 and now it is almost 2 months protected sex during this period but condom use is not 100% safe.
we first need to exclude pregnancy
in such cases.By this time Urine pregnancy test is positive.
You can consult a Gynaecologist he/she will after careful examination a Ultrasonography
and Beta HCG
level in blood to exclude pregnancy may be done.
Other causes of missed period if pregnancy is ruled out could be stress and anxiety, weight loss
sudden, Severe anemia, some medicines if she is taking (Steroids and antidepressants), Hormonal
If cause is detected it can be treated.
Please take care