I actually just read a story about a woman having a heart attack the other day and unfortunately she did not make it with her baby. The added stress on your body from the baby puts you at higher risks for all kinds of things, apparently. In this case the increased blood flow is too much for your heart to handle and results in heart attacks in about 7% of women. I'm not too familiar with strokes other than the numbness, but I hope you are over the worst of it now.
Oh gosh I've never heard of that happening in pregnancy. Do they know what caused it? Sorry I can't offer any advice but I'm very glad to hear it didn't hurt you or baby!