Biopsy on tongue

I went on Friday after at 3pm for  the white growth on the tip of tongue to be removed.its was extreme sore as they hold your tongue and deaden it with injections into my tongue.theycut it out and gave it a stich.i was told the stich is dissolving and in 7days it would fall out. But nearly 24h I was drinking water and I felt the stich falling out as I swallowed . I called nhs of my soul.was asked if i

did it on pur