Bleeding In Rectum, Chest Pain, Bleeding Starts With Fast Drip And Changes To A Squirt. Reason?

Hello. My name is Cristel. I have been bleeding sporadically from my rectum for almost a year. I have been to two GP's and a specialist, they say its from internal hemoriods. I am vacationing on Nantucket and have gotten pains in the center of my chest just below mt breastbone before the DAILY bleeding starts. It starts with a fast drip and progresses to a squirt (like a sliced artery). It comes out so fast that it causes the water to foam in the toilet. I'm leaving for home in the morning, but this is day four of this ordeal, this last bout has made me dizzy, and I'm a little afraid. I'm a 48 yr old non smoking female, 5'2" 110 lbs. I workout four to six days a week on average. My health is generally wonderful. Any thoughts?