Thanks for posting your query.
The breast pain
that you have mentioned is likely to be hormonal
and nothing sinister. But the heavy bleeding is the one that causes concern. You need to see a doctor to find out the cause and to treat it. You may be asked to have a scan and blood counts. You may also have some tests for your endometrium (lining of the womb). There are hormonal and non hormonal preparations available to control, bleeding.At the same time , you can have breast examination to leave no doubts.
Hope this helps, Take care!