NAC supplement stomach pain.

I have noticed that I have been taking 600mg NAC for a week now and I have been getting lower stomach pains, feels like it’s down by my ovaries kind of pain. I should mention that I have endo and get ovarian cysts I had one 8 cm removed in 2019. I am trying to prevent another surgery so I started taking NAC because I have heard it can shrink ovarian cysts. I have also cut out gluten, dairy, red meat and any bad seed oils. I have been doing this for about a month now. I am wondering if my body is detoxing or it’s more a reaction for the NAC.