Hi I Am 55 Years Old And Was A Marathon

Hi I am 55 years old and was a marathon runner . I had 3 children 2 csections. I had a TT 3montjs ago . I walked 5 days after . I developed a Seroma after 10 days n after drains were pulled n had it aspirated . I have constant swelling n pain at the naval . I wear compression garment 24/7 just to feel better . What is wrong . I am a nurse and I am working