Thanks for your query.
You are having a metropathic cycle, with irregular bleeding and spotting, with no identifiable pattern.
This sometimes occurs due to hormonal
imbalance due to intrinsic causes, or some medications .
ALso, stress, anxiety or hectic travelling/emotional upheavals cause this kind of bleeding.
Thyroid or adrenal hormone imbalance
, polycystic ovaries
etc. could be responsible.
is known for causing such erratic spotting and cramping.
Some polyp or lesion on the cervix or in the vagina could cause such spotting.
IT is difficult to say offhand what could be the exact cause.
You need to consult a gynecologist, and go for a thorough check up, pelvic ultrasound
and appropriate blood tests as advised.