Ingrown toenail help, please!?!?

Hey there! So on both my toes, both sides of the big toe nails have been ingrown several times. The first time, I went to the podiatrist to get it cut out. He only cut out a samll portion towards the front of the nail, but the entire side of the nail becomes embedded in the skin. A few months later, I experience another problem with an ingrown toenail. This time, its on the opposite toe and on the side that touches the little toes. That was incredibly painful and caused lots of pus and redness. Out of frustration, I started cutting at that toenail and I accidentally peeled out the ingrown part. There was instant relief! Now, on that same toe, I just peeled out another ingrown toenail on the side that isn't touching the toes. There was some relief, but I know that there is still some of the nail stuck in the skin where it's closest to the cuticle. Now, that side of the nail is slanted due to me tearing out that little piece that was stuck in the skin, I want to know if there is anything I can do myself to get that last bit of the ingrown toenail out and to prevent them from ever coming back. Now that my townails are on slants, I'm not sure if I will benefit from it or if it will just give me hell.

Please help me!