Stitches

I had stitches after birth 3 weeks ago so they should be desolved already. Up until now I have just kept it all clean but have not looked at it because it scares me.. I have noticed that it has healed but I can see a split like it didn't heal or something :( it looks ugly and now I'm worried it's gunna be like that forever! I'm sure it's already healed so I'm pretty bummed and don't want my hubby to see it.