12 Weeks Pregnant and bleeding

I am currently pregnant at 12 weeks through IVF , yesterday there were a bit of bleeding when i go to the toilet. But today when i woke up the bleeding stopped and brown discharge was visible each time i go to the toilet. Is it normal to bleed at 12 weeks pregnant ? There were cramps as well but only mild cramps and bearable. #advicepls #pleasehelp #firstbaby