Ok, that was really confusing... you went from you being pregnant, to sounding like you're a lesbian couple where she is pregnant, but it says 'my husband and I'. Really confused here...
Strep B is as random as it gets. It doesn't affect you in any way (more harmful for the baby), they'll just put antibiotics in your IV when you give birth. Same with BP. If it's associated with Pre-eclampsia, it's just as random. They don't know what causes it, and the healthiest pregnant women get it, along with the most unhealthy pregnant women. gestational diabeties is a little more controllable, but it just means a little more strict diet.
All of them should go away once the baby comes, but it's possible to get actual diabeties later in life and in another pregnancy. As for the infection, drink lots of water and cranberry juice. If it doesn't go away, I'm not sure if you can take the antibiotics while pregnant, but they will surely give you some afterwards.