What should I do for extreme pain & swelling 3 1/2 mos post op & what does irregularity in the rectus muscles mean? (Photo)

If there is fluid, that is by definition a seroma, and would be treated by aspiration or replacent of a drain like a Seromacath, which is a small percutaneous drain which is easy to insert in the office, with or without ultrasound guidance.
Scar hardness at the sides is common for the first three months and should soften over the next few months at which time a revision can be done if needed. Scars that are thick and raised are called hypertrophic, and keloids are a scar mass that extends beyond the scar border.
Treatment of hypertrophic scars is by siicone pads, like Embrace, scar gels like Biocorneum and lasers, such as fractional erbium or short pulse 1064 YAG (aerolase) or similar.