Coming off birth control? Help!

I came off the pill the first week of March! It has been 33 days since my last cycle (my normal is 28 while I was on birth control) and I have been having serious back and abdominal cramping along with nausea going on 9 days! I am not pregnant, I’ve taken test and had blood work! Is this normal? I am miserable! I was on it for 8 years! Should I make an appointment with my obgyn? What will they even do?