HI,
You were on depot fP preparation for last 7 years Following the withdrawal of depot preparation.
The periods may become irregular, profuse or scanty after withdrawal. The time for attaining normal menses pattern May vary person to person. (4 to 6 mths)
You say you were normal all these 17 months.So withdrawal is less likely to be cause of your current problem.
Conception & miscarraige may be considered if you are in child bearing age.
If you are in pre
menopause may be it is irregularity due to that.
Some vainal polyps,cervisitis, inf of endometrium, or intrauterine conditions like fibriods may cause this type of problem.
Please cosult a Gynac , her obervations aloong with nessesary investgations will be needed for a releif.
TIll then take rest, nurishing ,light diet.haemostatic agents like ethamsylate or citrous bioflavonide may be taken to control the excessive bleeding.
Take care. thank you.