Got a root canal done years ago and years after got a crown (2015). Now the gums in between my tooth and crown hurt. Advice?

I got a root canal done years ago and it took me years to finally place the crown (2015). Ever since then I always have to floss there because food easily gets stuck. It’s been 2-3 weeks that I noticed that the gums in between my tooth and the tooth with the crown hurt especially when I floss it, I even bleed. I am 10 weeks pregnant so I don’t know if that’s a contributing factor. What can this be? I’m my picture I am pointing where In between it hurts. It’s not around the crown but in between teeth.