The data you reported (stomach cramps, back ache. side cramps, tender breasts, feeling little emotional, menstrual period started when not expected), it seems likely that you might be experiencing hormonal imbalance-related conditions.
The symptoms of changes in the female hormone levels can sometimes look similar to the early symptoms of pregnancy, because similar hormonal changes occur in the early pregnancy, too. What is harder to find out is the exact cause for the hormonal imbalance.
It might be caused by temporary fluctuations of the production. Stress, both physical and emotional, might alter the hormone production. Sometimes the symptoms subside when the menstrual period is over and do not extend to the following menstrual cycles.
If the same symptoms occur during the next menstrual cycle, you are advised to visit a gynecologist. A physical examination and hormonal laboratory test are highly likely to be performed. If a hormonal imbalance is detected, the gynecologist might give you hormone-containing pills in order to try to restore the normal sex hormone production in the body.
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