Is it possible that the psychological and physical symptoms I am experiencing, in addition to the strange events I have gone through (such as seeing a snake and fainting, and automatically reciting the Quran), are connected to the psychological traumas I suffered in childhood and adolescence, or are they caused by the sorcery and black magic practiced by my father?

Your father's resorting to sorcerers and charlatans is a grave mistake and forbidden by Islamic law. The cure for magic is through Ruqyah (Islamic exorcism) and adherence to adhkar (remembrances of Allah).

Prayer is the greatest matter of religion after faith, and preserving it is essential for the heart's steadfastness and rectitude. Neglecting it is among the gravest major sins.

The illicit relationships you engaged in are a mistake, and repentance is obligatory by abandoning them, regretting them, and resolving never to return to them. Marriage is the best way to remedy this, and your father should marry you to a man of religion and good character. His refusal merely because he is from a different country might be considered 'adl (unjust prevention of marriage).

Until marriage becomes easy, you must be patient and chaste, seek Allah's help, frequently engage in dhikr (remembrance of Allah) and du'a (supplication), avoid watching what displeases Allah, beware of bad companions, associate with righteous women, strive against your lower self, be patient, and be keen on learning religious matters and filling your free time with what is beneficial.

Overcoming what you experienced in childhood is achieved by strengthening your connection with Allah and seeking His help.