Random pain

Mags

So I just dropped birth control cause I’m having surgery today so I stopped it last week (doctors orders). I have this horrid pain in my low abdomen only on my left side... is this from stopping my birth control or just ironic how it happened? Any thoughts would be great... I’ve been on birth control since I was 15 and now I’m 22 so been on it a long time and just suddenly had to stop.