Persistent headache

I never get headaches but have had one off and on for about a week now, always in the same spot on my left temple. It isn't that strong but it's there. I'm 37 weeks and 5 days. I'm constantly drinking something at all times. I have very little caffiene. I take multivitamins every morning, and have 2 cups of red raspberry leaf tea throughout the day. I don't have any other symptoms of preeclampsia but it still worries me. Somebody tell me I'm overthinking things.