My DS had both a lip and tongue tie that weren't corrected till 4 months.
We had his tongue snipped as we couldn't wait for an appointment with the dentist. Yes he screamed but he did so as soon as he was held down, his scream then did not change the whole time so I couldnt tell when they actually did the snip (I wasn't watching). Yes there was blood but as soon as he had b00b he claimed down.
I was not advised to do stretches and gave him panadol the first night.
We have been to the dentist since and he will do his lip tie when he is older and able to understand not putting things in his mouth etc.
Whilst his tongue is not 'normal' - he can't poke it out as far as others, it is a whole lot better. We will continue to keep an eye on his speech.
I used nipple shields and mix fed for nine months - a whole lot longer than I ever thought I would.