If a person dreams that he is marrying his mother, sister or any such person with whom marriage is forbidden is Islam-and such a dream is seen in any of the sacred months of Thil-Qa'dah, Thil-Hijjah, Muiharram or Rajab-it means he will proceed to Makkah and Madeenah. But if such a dream is not seen in any of the said months it means he will treat his relatives with kindness and serve them well. If his relationship with them was estranged, it will be re-established.
Allah knows best.
I took a quote from a dream interpretation dictionary.
"To see a dead baby represents a new development ending, or being overcome by negativity. Something that began, or was in the works was stopped. Positively, a dead baby may reflect feelings of being spared a responsibility or lengthy problem. " Sourced From www.dreambible.com
Perhaps you are disappointed about something bad happening to something you have good expectations for?