How would you know if you have fibroids?

By physical, imaging. Fibroids can be discovered by physical exam or by imaging (exs. Pelvic ultrasound, mri). They can be very small (pea size) or quite large (melon). Most women that have fibroids are asymptomatic and do not require any treatment (unless they are causing infertility). Fibroids can cause significant symptoms, most notably heaving menstrual flow, pelvic pain, and increased urinary frequency.
Finding fibroids. The most definitive way to find fibroids is by pelvic ultrasound. About 50% of women have fibroids, but most will not need to do anything about them. Heavy bleeding is the most common symptom.