Hi, My Name Is Vyvienne And I Am 26 Years

Hi, my name is Vyvienne and i am 26 years old from Sarawak, Malaysia. I have a question. everytime i have my period i have a stabbing like pain at my right waist area. the pain occurs within a week before, after and during my period. Sometimes it is so painful that i have to stop working and take a deep breath untill the pain go away so i can continue my job. i've checked my urine and blood for renal profile but everything turns out to be normal. is it a symptom that i should be worried of or is it normal pain that women experience during period? I've heard about cramp during period but i am pretty sure its not a cramp. The pain started only few years ago and starting to worsen throughout the years. Thank you.