Headaches at 16 weeks

Has anyone else been experiencing more frequent headaches at 15/16 weeks or kn 2nd trimester? Before pregnancy, I've always been one to get headaches and with my first pregnancy, I remember having really bad headaches but it was mostly first trimester. This is my 2nd pregnancy and while I had a few first trimester, I've been having more headaches since 14 weeks. They aren't migraines and my blood pressure is normal. Just wondering if anyone else is experiencing headaches in 2nd trimester?