Welcome new chaver!
I commend you on your attempt to change, to break free from the chains of internet depravity and sex with self.
I am struck with how very challenging you are finding it and I completely relate. But I'm a little concerned. It sounds like you are addicted. That would mean you are an addict. A lust addict. Only you can decide if this is true, though. (You may want to take this simple test:
www.sa.org/test.php)
If you decide that you are indeed an addict, then while trying to quit P&M is commendable, it will probably not be enough. Because we are addicted to something larger, that P&M is just a part of. The lust drug can be had in many ways. We get a dose every time we entertain lustful thoughts and fantasies. Every time we lay eyes on a woman (unless we absolutely must speak with her, and even then, we are davening internally that we see only the person, not a lust trigger.)
So in order to truly break free, we need to abstain completely from all forms of lust. Otherwise it's like a vodka alcoholic switching to beer. He's still the same alcoholic, he just thinks things are different now.
When you cut off the supply from one area, as you have, the craving will intensify in the areas you have left open. This is why you are "thinking and dreaming much more about sex than before."
To break free from lust, we must cut off all our suppliers. Practically speaking, this means
1. Extreme shmiras eynayim in all settings. No women, no part of them.
2. Guarding of the mind against fantasies and mentally stored images. To do this, I turn to Hashem with tefilah, every time I detect a lustful thought approaching, and every time I'm tempted to act out in any way.
Here's the tefilah I use:
"Ribbono Shel Olam, I am powerless over lust and my life has become unmanageable.
Only you can restore me to sanity.
I turn my life and my lust over to your care and ask you to please heal me from this illness of lust. I don't want to lust, I only want You and a relationship with You and Your Torah, and appropriate attraction to my wife. Take my lust. Please, take my lust" (You might leave out the wife part if you're single)
Do some reading here every day. Learn and grow. Pick up some new good habits and hobbies. Exercise.
This will get you into recovery. There's still work to do on yourself once you're sober. Let me know when you're there and we'll talk.
Hatzlocha!
Alex