 [ Symptoms ] i am 10 weeks pregnant i am having severe back pain headache for past few days [ Disease ] i am finding no direct relation between your back pain and the other symptoms unless you are suffering ibs or the back pain may be due to the pregnancy load on your back that can be aggravated if you have gastroenteritis diarrhea headache in my opinion there is no need to worry so far you can visit your doctor if symptoms did not subside after 3 5 days but avoid dehydration