Hiding a c-section scar?

I had a baby when I was 16 and was subsequently kicked out of my home and had no support. I terminated my rights and gave them all to her father and had to move states to live with my dad because my mom kicked me out. ANYWAY it’s now been almost 4 years and I haven’t had contact with my daughter for personal reasons, but I’m not ready to talk to my /boyfriend/ of a month about it yet. He pointed at my very small c section scar and asked about it.

How should I handle it? I kind of laughed it off but I’m not sure if telling him now is right for me and I don’t want to keep lying.

Any advice would be nice honestly