That would be me and TT'd DD.
I was "lucky" to have OS and OAL as well as (TMI) very small breasts even when pg and bfeeding and also small and "easy" as in very flexible, stretchable nipples. Also, the fact that she was my 2nd baby made it "easier" both psychologically and hormonally for us as a bfeeding "dyad".
We didn't know about the TT (shame on me as a speech and lg therapist). I knew there was something "up" as DS had been the perfect bfeeder, lost only 90g and was up 200g on birthweight by day 5, never a sore nipple, never an issue with latch, clicking, choking and STTN at 14 weeks.....
DD was a different story. I thought she was just more "touchy" than him. Turns out she isn't touchy at all but was an angelic spirited trying to deal with a tongue tie, OAL and OS!!! She reached birthweight at only 2 weeks 5 days but here, if you give birth privately, they don't do weight checks after discharge until 6 weeks if baby is otherwise healthy. I had my own baby scales and was worried but "informed" so we went with it and she got better and better at getting a good feed and dealing with the OAL - through block feeding, pumping a little at beginning of feed, feding against gravity etc etc.
She was a very long baby - 58cm at birth - and was down to 3.2 kg at her lowest (born 3.7) but the docs were happy with her by 6 weeks as she was on 97th for length and "still" or rather back to 50th for weight....no matter what my complaints about unsatisfactory feeding times, breastmilk all over me and her and not in her belly etc etc they didn't seem to care. I finally clicked about the TT around 12 weeks (!?!) but at this stage she was doing "so" well (75th for weight and still 97th for length) the reg paed didn't even want to send me further. We got a referral for ENT surgeon and they clipped it once we got there at 8 days short of 5 mths. Honestly, it didn't improve our "Feeding relationship" as we still had bobbing on and off, major distraction and full feeds only if and when in the dark,....but her weight finally met up with her length in the month after clipping and stayed that way for the rest of bfeeding and beyond.
I am glad we clipped but sad we couldn't do it earlier....Emma's clip is only a partial one unfortunately due to the "age" she was when it was done - there is a significant amount of scar tissue there that reformed probably soon enough after the procedure. If done earlier, it may have been better. For now, speechwise, she can make every sound in her two languages except the Polish rolled /r/ but this typically comes a bit later than 3 yrs anyway so I am not blaming the partial tongue tie though it is still quite obvious (she can't tip her upper lip or lick it).
Hope you can find out soon enough in terms of the tongue tie - check when your DD is latching whether or not the tongue passes her gumline, this is a good indicator.
S x