Hi, I understand your concern. * You have gestational diabetes with head ache & palpitation.- That points to high blood pressure. Please get it checked & exclude /diagnoase it first- for it can cause problem in pregnancy. If it is noted, you need regular medicines prescribed by your doctor along with healthy ( Diabetic) diet in multiple small servings, restricted salt./ regular pregnancy checkups./exercises/ meditation & calmposed positive mind. * Gestational diabetes can cause low blood sugar - so have more frequent/small servings of food you are advised to take accompany blood / diabetes can accompany high blood pressure. * Palpitation may be from anxiety/ accompanying blood pressure. * Even refractory error may lead to head ache. Get your eyes checked to exclude it. * Your head ache need not be due to blood pressure- it can be Migrain- which needs, - your own observation for triggering factors & avoid them, -Have regular sleeping pattern./ avoid stress/tension- - Exercises,massage, relaxation techniques,positive psychology help. -Use biofeedback technique. Prevention by above methods will need minimum medication - migrain medicines( aspirine, NSAIDs, Triptans,ergots )can be taken in minimum possible dose as & when required can be taken with your doctors advise Thanks.