Pregnancy 17 Weeks More Condition_symptoms At 17 Weeks Pregnancy, The Doctor Adviced To Make The Triple Test, To Check Any Problem.?

At 17 weeks pregnancy, the doctor adviced to make the triple test, to check any problem.? - pregnancy 17 weeks more condition_symptoms

I am 18 weeks pregnant and not test nose. Is it absolutely necessary to pass the test? I have back pain, leg cramps seriously. However, my stomach has not become much bigger, so I sometimes get the feeling of movement. What are the symptoms at this stage?