I have filshie clamps. had a short cycle last month. i am a few days from cycle, i have tender nipples and a yeast infection. what could be going on?

See your doctor: Symptoms and concerns like these mandate a thorough evaluation by your doctor. Only after such an evaluation, which may include labs and radiographic examinations, can he/she let you know what's going on and how best to help you.

Probably pms: Yeast infection is just poor timing (i suppose a yeast infection is always poor timing), but unrelated to your period or sore breasts. Tender breasts is a pretty classic pre-menstrual symptom. Call your doctor about your yeast infection and wait to see if you start your cycle like expected.