Tender belly

Anne 💙💙💙 • Mom to 3 boys. August 2015, December 2016, December 2018
When I touch my lower right side of my belly it hurts. I also started having brown blood again. I'm 19+4. I called my dr and the nurse said don't worry unless the blood turns red but why such a tender belly?? Is this just a normal pregnancy symptom or is it something I should be concerned about?