What is the significance of expecting something to happen after seeing a dream, and what should be done after missing the Isha prayer for two days?

You can ask specialists about the interpretation of your dream. If you see a vision that you like, then praise Allah for it and speak of it; and if you see otherwise, then seek refuge with Allah from it and do not tell anyone about it, for it will not harm you. This is based on the Prophet's (peace and blessings be upon him) saying: "If any of you sees a vision that he likes, it is only from Allah, so let him praise Allah for it and speak of it. And if he sees otherwise, something he dislikes, it is only from Satan, so let him seek refuge from its evil and not mention it to anyone, for it will not harm him." If your intention by missing the "end of the 'Isha'" is missing the Witr prayer, then make it up as two rak'ahs after the sun rises. If your intention is missing the obligatory 'Isha' prayer, then make it up immediately upon remembering or waking up, based on the Prophet's (peace and blessings be upon him) saying: "Whoever forgets a prayer or sleeps through it, let him pray it when he remembers it."