It can also be stress, had two tension headaches right after each other but work had been hectic. Went for a massage and it sorted it out.
Go get that check , i was the same way and just found out at 36wks I'm anameic! But it can be high blood pressure, dehyrdation, anameic..go see your dr. Stay hydrated and cool
I've been told constent head ache with no relief is from high blood pressure. I would call ur dr amd let them know. A cold rag on my neck front and back helps me
Drink a lot of water.. or gatorade.. might be dehydrate.