What is the interpretation of dreaming about some upper and lower molars falling out, and the shape of two upper incisors changing, accompanied by joy about it, hours after a suitor proposed and before Fajr prayer, knowing that there are family health and psychological problems?

We have no knowledge of dream interpretation, and what you saw in your dream does not necessarily have a connection to the engagement or family problems. From the etiquette of Islamic law concerning engagement is to accept someone with good character and religious commitment, as stated in the hadith (definition): "If someone whose character and religious commitment you are pleased with comes to you, then marry [your daughter] to him. If you do not do so, there will be tribulation on earth and widespread corruption." It is also recommended to perform Istikhara so that Allah may choose what is best. To solve family problems, we advise prayer and wisdom, and Islamic law has outlined solutions for spousal discord. As for psychological distress, if it is not organic, then turn to Allah with supplication and ask for healing, recite the Quran and perform ruqyah (definition) (Islamic exorcism), and frequently engage in dhikr (remembrance of Allah) by which hearts find tranquility. There is no harm in consulting a trustworthy female psychiatrist if needed.