Re: cyclic changes
What you're experiencing could be normal abdominal discomfort associated with the run-up to your period. Bloat, breast tenderness, constipation, cramps- those are all common premenstrual symptoms. But this could also be something else- endometriosis leaps to mind because you experienced increased pain with the return of your cycle.
I'd press the doc for an explanation. What happened after he/she said "you might have a uterine infection"? Did the doc just let you walk out, or was treatment or further diagnostic testing suggested?
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