Rest, ice, warm baths with epsom salt, don’t be too active.
I may be jumping to conclusions but it’s very common for these nerves to refer pain into your abdomen. It’s also possible for these nerves to cause muscular dysfunction in your core as a result of the damage and this could be what’s cause your pain. Is it the nerves themselves or is it the nerve damage being translated into muscular pain? The difference sounds subtle but the consequences and treatments are much different.
Let me first start by saying you cant fix a nerve. It’s posisble for it to heal on its own so patience is your friend. However, there’s no single procedure or surgery that will “fix” it. No matter what the doctor tells you, he cannot “fix” it. He can cut it out, do ablation, all sorts of things in hopes of stopping the pain but he cannot fix it. Often times they just Rx pain meds or nerve agents.
If the muscle begin to atrophy, I’d focus your time and money on a good physical therapist. I’ve lost my low back, hip, and knee to this crap. My papas, QL, hip flexors, and adductors are about 30% strength and I’m struggling to walk.