Hello,
Welcome to ehealthforum and thanks for writing
Decreased blood flow and change in the bleeding pattern could be suggestive of hormonal imbalance,pregnancy,any uterine or ovarian cause as ovarian cysts , fibroids, polyps, thyroid hormone disorder, ovulation symptom etc.It requires a pelvic examination and investigations as USG scan and hormonal analysis which would help in ruling out the cause.Since I am not observing you it is difficult to give a precise diagnosis.
Usually for inducing periods hormonal preparations are given which elevate the hormonal levels and thus bleeding starts.If the blood flow does not resume by itself consider visiting a Gynaecologist for evaluation.
Take care!