When do stitches finally heal?

Ella

During birth i got a 2nd degree internal tear. I don't know how many stitches i got but i know after like 4 days two fell out but i still have one in the entrance. Some days its tight and keeps everything closed. Then other days its loose and i can see the whole tear still not healed. Im in no pain anymore for awhile now but how long till this tear heals and also is it normal to be loose one day and then tight the next?