Since u have not mentioned after periods when ur pain n bleedig has started its difficult to understand the cause.
If its midcycle, it may be ovulatory discomfort..esp since u have started diet ..
Unless pain or irregular bleeding.. no issues.if there is please visit hospital.
If associated bowel issues like constipation or change in bowel colour.. please visit hospital.
Next Steps
please have online consult with any obgyn where u can discuss ur troubles in detail