All these things you mention are also classic tongue tie/high palate symptoms but of course I cannot diagnose for you!!
Although some tied babies rip the mother's nipples to shreds, not all do. I was lucky enough that ds1 didn't really hurt me after the first few days, but he was not feeding well at all. It is possible for the latch to look ok on the outside, but what is happening inside the mouth is all important too.
The swallowing air can happen with the incorrect tongue motion and the clicking may have stopped because she has learned to compensate.
Have a look on my profile, there are pictures of ds1 on there from a couple of years back.
He had posterior tongue tie, a hefty lip tie and a very high narrow palate.
The high palate was encroaching on the space for the nostrils and the eustacean tubes causing mouth breathing and congested ears with noise and slight hearing loss. Mouth breathing can cause problems with tonsils and it also alters the growth of the bottom jaw. By age 7yo, Ds1's orthodontic problems were evident. His bottom jaw was already bigger than the top (should be the other way round) and there was clearly not enough room for his adult teeth.
We had his tie revised twice. The first time was done here under GA (I didn't know any better at the time). The revision was not done completely, but it was enough to completely stop the reflux like symptoms he was having. It wasn't actual reflux, but he was not chewing his food properly (it was difficult for him, as was swallowing) and was also swallowing down a lot of air. It would come back up and bring stomach contents with it. He had an endoscopy to make sure there was nothing more sinister going on, and it only showed irritation from the acid.
A few months after the first revision, I realised it was not done properly and also that the orthodontic issue had to be addressed as well. Just before his 7th birthday, he had another revision, this time with laser and local anaesthetic and he began 2 years of braces and headgear to widen his palate and open up his nostrils. We travelled a 400 mile round trip to have him revised the second time by a dentist this time.
The change in him was incredible. The snoring and mouth breathing stopped within weeks, as did the bouts of apnoea he was having. Our orthodontist also did osteopathy and regularly manipulated inside his mouth to help with the palate expansion as well as straightening out the curve in his neck which was having a knock on effect on his hips, knees and ankles.
Had we known all this when he was younger, all this could have been dealt with sooner and we may have avoided all the problems that he had. He also had allergies and intolerances. Tied kids usually have poor gut health and it appears that this may be part of the problem which causes ties. (No solid "proof" as yet)
What to do? Well, you need to go straight to somebody who knows what they are doing for assessment. That is unlikely to be your HV or GP. Google Bobby Ghaheri and Dr Kotlow for information that you can trust. Join one of the Facebook tongue tie support groups and inform yourself as well as you can about the issues you may be dealing with.
Given that she also has a high palate, you may need to find an osteopath who knows their stuff about tongue ties. Again, you may need to search for someone. Ties can cause tension in the head/jaw/neck which may need addressed after a revision and work may be needed on her palate to help flatten it out. This is normally done in utero by the tongue, but if the tongue is not moving fully then this cannot be achieved.
A distorted palate can also narrow the post nasal appertures (the holes at the back that open into the airway) and this narrowing can be the cause of snoring and more seriously sleep apnoea.
I hope you are not overwhelmed with all this information. I just want you to know that there are people out there who can help, but you have to seek them out!