Yikes! Well, to tell you the truth, you really do not have any rights as a father until the baby is born and you order a blood test to prove paternity.
Being that she just got married, is there any way that the baby could be her husband's? If there is a possibility it could be his she may very well just play it off as such, and try to leave you out of the picture. If you should then decide that you want to be involved in the child's life if it is indeed your's, then you would have to get a court-ordered blood test. You would then most likely have visitation rights, and will have to pay child support.
On the other hand, if there is not a possibility it is the husband's when he finds out about the pregnancy he may opt to annull the marriage and leave her. In this case she will most likely turn back to you for support. The only thing you can really do now is to wait and see how things play out.