It won't do any harm if you get yourself a second opinion if you are really concern. You're pregnant and now is not the time to be stressed, so if a second opinion can give you peace of mind, then please go for it.
Hi!
I am sorry to hear about your medical problems. What you have is probably A pregnancy related headache. They mimic a migraine or tension headache. Usually there is a trigger, like a particular food or light or maybe traveling in a bus etc. Keep a headache log and see what are the common points, what food triggers it and doing what helps reduce the pain. Consult your gynecologist and get your blood pressure (this is ruled out), diabetes and thyroid status analyzed as any change in this too can cause headaches in pregnancy. It is difficult to comment beyond this at this stage. Do consult your doctor. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.
Blood pressure is fine, so I know it's not anything to do with preeclampsia.