I am 29 Y.O. female. 10 weeks pregnant with prior back issues that have been under control for about a year now. Previous pregnancy being a miscarriage. I am having severe back pain, headache for past few days, and diarrhea past couple days that accompanies the back pain. Is this something I should go to ER about? I called my OBGYN and left couple voicemails with no response from them. I have zero bleeding or abdominal cramping.