Chances are there is no problem. It is possible the extra bleeding is a symptom of your fibroids. While not all women have heavy bleeding or bleeding between periods with fibroids, many do.
In addition, most women have times in their life of irregular periods - both involving missed periods or breakthrough bleeding between them. While some women menstruate like clockwork naturally, irregularity is actually the norm except when women are on hormonal birth control.
Thyroid and bleeding disorders can also be possible causes. If you continue to be concerned you should see your gynecologist or family doctor. It is also possible you could be having hormonal fluctuations which sometimes occur in the perimenopausal period. I know you seem young for that but some women experience symptoms up to 10 years prior to menopause and some have early menopause.
Best wishes and good luck with your upcoming treatments.
The answers in online forums are for information only and are not intended to substitute for medical advice and care. Please see your personal health care provider for further evaluation of your individual case.
Debbie Miller, RN