I have been experiencing headaches that make me vomit, I’m wondering if this could be hormonal?

I am a 51 year old woman. I have not had a period in 9 months. I do experience occasional hot flashes, as well as mood swings, but nothing that I can’t live with. I am in good health, I don’t take any medication on a regular basis (ibuprofen sometimes, multivitamins when I remember, Alleve every once in a while), I weigh 118 lbs, I eat pretty healthy; I’ve been a vegetarian for 26 years. I rarely get sick, although I do suffer from some bad headaches every so often. Recently (in the last 4-5 months), I have been experiencing headaches that make me vomit. Fortunately, it’s only been once a month, but the headache was painful enough to wake me from a deep sleep, the the pain was such that I felt like my face was going to crack open. Each time I’ve gotten this headache, it’s been the same thing: Middle of the night, horrible pain in my face, at the base of my skull, and my forehead. Each time, it has made me vomit, but not right away. I suffer for a bit before the nausea kicks in. Also, when I do vomit, it’s bile-nothing that I had eaten the night before. I’m wondering if this could be hormonal, considering that fact that it only happens once a month, and I am not getting periods any longer. Thank you in advance for any information you can give me!

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