2 weeks old and a 'clicking' noise while feeding

[Indadhanu]

DD2 is just over two weeks old and a lot of the time while feeding she makes a funny 'clicking' noise while she feeds. I've not experienced anything like it - my DD1 was fed until 2 years, 4 months and never made this clicking noise. I'm not really sure what the cause is so I haven't really been sure what to try. I kind of try repositioning but again, since I don't know what causes it I don't really know where/how to reposition her. Sometimes she also seems to be quite inundated by my let down and splutters a lot, which may or may not be related as the clicking and the spluttering sometimes does and sometimes does not happen together. Her weight gain is fine, latch seems to be perfect, although sometimes she'll get a little lazy and her cheeks tend to 'suck in' - I delatch and reattach when I see this. I initially thought that this was the cause of the noise but the clicking is becoming persistent every feed and the sucked-in cheeks doesn't seem to be all the time, just when she gets lazy, sometimes every feed but not always, so I can't really tell if it is related to the clicking either? She's also having huge issues bringing up her wind and seems to get a lot of tummy pain, not sure if this is related. I have been trying to see if it is something I am eating although there's nothing I have regualrly enough to cause persistent windiness, tummy pain etc.

Does anyone know what may be causing the clicking? It doesn't hurt but surely it's not normal?