Thanks for the query to H.C.M. Forum.
Usually b pill 7 is safe and have no side effects. Nausea
may be due to infection as you mentioned in your query that there is a lump in the right side of breast. Redness
In my opinion ,this is not due to hormonal
imbalance rather an infection in breast ,hence there develops lump.
Consult a surgeon and get in physical examination and take treatment according to his opinion.
Hope I have answered your question.
If further any question I will help.