Thanks for the query,
It could be signs for an early miscarriage
, if you are sexually active kindly check your pregnancy
test. Or it could be just Dysfunctional Uterine bleeding
pattern. And the pain your having might be a congestive dysmenorrhoea type, could be associated with pelvic inflammatory disease
Hope I answered your question, Kindly reply me if you have any further queries or any comments. I will be glad happy to help you.