My daughter is learning Parshat Bereishis now and we were going over what she learned and we read the story of Gan Eiden. It got to the part where Adam and Chava heard Hashem's voice going through the the gan and they went to hide. I said to her why did they hide? So she answered me because they were dumb and didn't realize that they can't hide from Hashem. So I said back to her they were not dumb at all and everyone thinks they can hide from Hashem, even you. I said have you ever done something that you shouldn't have and hid it from your parents, and she reluctantly said that she had, so I said but even though you hid from me, you didn't hide from Hashem. You acted like you could but really you could not.
Don't worry about your yirat shomayim in this regard. If you are an addict then no amount of yirat shamayim will fix your problem, it will just help you hold your breath longer. Eventually you will have to breathe and you will fall again. Yirat Shomayim is such an abstract idea when you try to butt it against some in your face very real lust. The yirat shomayim doesn't stand a chance.
Also I think for most of us porn is not the issue per se, it is a symptom of the greater issue of lust. It is an outlet to the lust. Good for you that you realize this already, that is a big step. Also, congratulations on deleting your accounts, that too is a huge step in the right direction.
From my poor experience there are two aspects to work here. (I am only at this a year and am still working to find my way, so take my advice as such.)
First you have to get yourself away from lust and lust triggers. You have to break the patterns that you have been living in the past many years where this has become an ingrained habit. For that the 90 days is powerful. It can give you confidence that you can in fact overcome and it gives you a time that you are free from acting out and that can help break the habit patterns that are so imprinted in your brain pathways. For this deleting accounts, watching your eyes, filters and taphsics and whatever else you need are so important. And you need to do this one day at a time, adding one day after another like one foot in front of the other until you have gotten to 90 days and beyond.
At this point in your journey this should be your focus, but you have to keep in the back of your head that 90 days is just a nice round number, if you get to 90 you will not be miraculously cured. You have to also understand why you are reaching for lust. What is wrong in your life that you are using lust to heal. Then you have to take actions to find healthy ways to heal and not use the slow death that lust provides.
I wish you the best of luck and hope you can succeed one day at a time.
Eli