For now I would just explain to the family that you would prefer them to keep away until you definately find out if you can or can't infect them. Usually if it is a wound the MRSA is contained to that area and as long as it isn't touched by others they should be ok. I doubt you were the cause of the 2 lost pregnancies.
My husband had MRSA while in the hospital 3 years ago and was confind to a sterile room and I had to wear a gown and mask while visiting. I also had to either toss the clothes he had there or bring a few home and totally wash them at least twice.
Why you were never told this before is above and beyond me. Hopefully the antibiotics will get it out of your system but some antibiotics don't touch MRSA so they have to get the right ones. Hubby was on 3, 2 orals and one through an IV.
Wishing you the best and keep us posted...JJ...