Working out after a C-section

Tessa • Retail Development Manager. MA Forensic Psychotherapy. Engaged to J. Proud LGBTQ. Trying for #2 this winter! :)
Hello ladies!
​My son is almost 2yrs old (20 months to be exact) and I had a c-section with him. I've noticed whenever I work out and do anything involving my abdominal of stomach muscles it hurts- I have to stop whatever I'm doing and do something else. Am I the only one? Should I be concerned?