thanks for the query.
causes of missed periods with spotting could be due to pregnancy
, excess weight,
imbalance, ovarian cyst
I recommend you to get your blood tested for beta HCG. Increasing titres suggests pregnancy.
Once pregnancy is ruled out, get ultrasound
pelvis to rule out ovarian cyst,
Thyroid profile to rule out thyroid problem.
Also get yourself examined by a Gynecologist for diagnosis and relevant tests.
Hope this helps.