I had an open myomectomy 3 weeks ago with dissolvable stitches..I am a bit worried… see below

My open myomectomy was a cut that was a bikini one and a vertical one just below my belly button going down so I have two scars and They’re both supposed to be dissolvable however it’s nearly coming up to 4 weeks. I can see what looks like a plastic string or stitches still hanging out and I’m a bit worried if they’re actually dissolvable did this happen to anyone else? How long did it take for them to totally dissolve? Do I need to go see a nurse to see if they need to be removed. Also, any advice on how to take care of the scars would be helpful, especially if you’ve had two cuts like me. Thank you :)