Ttc and PMS

M ttc since 2 years,also had a early miscarriage. My doctor is treating me with profelin (clomiphnene citrate) followed by an injection of IVF 5000(its a hormone)) . M so worried that my menstrual symptoms started to appear that is breast pain . My lmp was 12 jan 2019 n jow its 2 feb... from few months i experience such pain in breast before periods . But when i m having proper n focused treatment then why it is happening .?? Need some courage from other women who r ttc n already momss...