God is willing to speak both to prideful people and to humble people, though He likes to humble the proud so that they will be more fit for His Kingdom. One of the difficulties prideful people face is that they sometimes want to rely more on their own personal opinions, feelings or private revelations than on the wisdom of others, either fellow Christians or the infallibility of the Catholic Church. That kind of attitude can be a result of pride and it’s worth fighting. Pride is an obstacle we all struggle against

. I’m trying to get away completely from all pride in my private revelations, and in the praise some people give me. It’s easy to be consumed in pride, and I and most everyone really has to fight it.
In a more specific response to your question, I simply would like to reiterate again the advice your priest gave you. Don’t make big decisions about whether you should be Orthodox or Catholic while in the midst of a time of great trial, darkness and confusion. Wait until you’ve been several months experiencing peace and none of these trials. Then, after that time of peace has come, make your decision about which Church you will live in based on reason, historical, scriptural and patristic evidence, and firm conviction. Don’t make this decision now, through uncertainty and private revelation. Wait. What you do should be established on a firm foundation. What you have now is uncertainty and private revelation. Wait until you’ve been several months at peace, without severe temptations or trials, and then make your decision based on reason, historical, scriptural and patristic evidence, and firm conviction.
Your private revelations in the Church could be deceptions (though I don’t think so, and their fruit indicates they are genuine) and your private revelations trying to attack your faith are in many cases certainly deceptions (such as the ones concerning mortal sin and the unforgivable sin, for these are contrary to both the teachings of the Orthodox and the Catholic Churches, and most Protestants also would agree with these). You’ve got to stop depending on
any private revelation or feeling. You’ve got to escape from that kind of dependence. Faith is the key; you’ve got to hold fast to faith through the will, and at the same time seek humility to listen to others and really listen and heed what they say, and especially listen to the bishops and official Church teaching. That requires humility, putting what they say above what you feel and experience. It requires putting the self second and distrusting the self. The saints sometimes received genuine private revelations from Jesus and their priests or spiritual directors told them that they were from the devil. They listened to their spiritual directors above their own instincts, which said these experiences were genuine, and God respected this and lifted these saints high because of their humility. Follow their holy and noble example. Listen to your spiritual director, to the Catholic Church, the bishops, Fathers and saints, above your own feelings, instincts and private revelations. Put yourself second in this way, trusting those whose relationships with God are beyond question and whose authority is certainly divine (both the Orthodox and Catholic Churches agree that our bishops have a valid apostolic succession) above yourself, and in this way you will become humble.
God bless you and grant you the strength to do this, in the footsteps of the saints, through the Immaculate Heart of Mary. In Jesus’ Name, Amen.