Thanks for using the forum. I am happy to address your questions, and my answer will be based on the information you provided here. Please make sure you recognize that this forum is for educational purposes only, and it does not substitute for a formal office visit with your doctor.
Without the ability to examine your husband and obtain a history, I can not tell you what the exact cause of his symptoms is. However I will try to provide you with some useful information.
If you have imaging-confirmed strokes (stroke on MRI of the brain) three times given your age, this is very concerning and warrants a workup to find the cause of the stroke. There must be a predisposing factor in you; treatment with hormones may not be the solution, in fact, the pill can actually increase predisposition to clotting. Some potential predisposing factors are what are termed thrombophilias, or a tendency to clot. These are tested for with blood tests and if found, blood thinners are indicated. Also, in a young person such as yourself, other potential causes of stroke include certain neurometabolic causes, infections, and heart problems.
If you have had stroke-like symptoms, the possibilities include TIAs or strokes, but also migraine auras. These would require further workup as well. I recommend evaluation by a neurologist as soon as possible for further evaluation of your strokes.
Thank you for using the forum I hope you find this information useful good luck.