Probably not: It sounds like you had a normal period. Cycle lengths can change for may reasons most time we don't know why. It could be stress or other factors.A 20 day cycle is shorter than normal but not unlikely. Don't know if you are trying to conceive or not, if so talk to your family doc about preconception care, if not talk to them about birth control options. I would be happy to consult on either.
Answered 5/4/2015
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