My husband, in his early 50's, had his stroke in September. I remember also being extremely fearful of a reoccurance.
I had also posted here asking how other survivors have lived or changes they have made since then, to prevent another stroke from happening. My husband has changed his diet and now works out more often.
He was told that the risk of a reoccurance is highest in the first month after the stroke, and then still elevated for the first year after. So we are still in the high risk zone.
i understand your fear, and it's normal to be scared. It's also common to feel depressed after a stroke. You came so close to death, after all.
For us it was a huge wake up call. I'm relieved every morning to know that my husband is alive and well. Every day with him is a precious gift, that came so close to have been taken away from me on the night of his stroke. He's made some other changes to his life as well, like spending more time with our child and being more assertive about what he wants. It's like we recognise that tomorrow isn't guaranteed and so we live more fully in the present.
A level of anxiety remains, of course, and I have started seeing a therapist myself for stress disorder. My husband himself is more or less back to work, back to normal. Cause of stroke is still unknown. I researched about strokes and read stories from survivors. There are good, evidence-based tips for preventing strokes out there.
The tests you have to undergo are unpleasant but should help to find the cause of the stroke. I empathise! I find waking up and counting my blessings, as well as going to bed with a grateful heart helps a lot.