Large mass in my abdomen and sharp pains behind my belly button 1 year after DIEP reconstruction (photo)

Hi there Im really struggling. Last year i had Diep reconstruction surgery for 2 types of stage 3 breast cancer. In the last recent mths my PS said i had diastisis recti But now its way worse! Its become a very large mass and i have severe pain behind my velly button. My PS isnt taking me seriously. She said im all about looks abd thaf i look alot better then when i first net her. Im goimg for a ultrasound tomorrow. But i know theres somethjng wrong and its like im being swept underr the table!