Hi and welcome to the board! Wiggling and squirming can be due to a bunch of different things (milk flow, supply, gas, teeth...) and sometimes it can be completely normal (although irritating!). To better answer your question, it would help to have a bit more information...
How old is your dd? Has she just started doing this? How's her weight and is she having enough wet and dirty diapers? Are you exclusively breastfeeding or adding bottles of EBM or formula? How was she eating before this (length and frequency of feeds)? Are you double or single side feeding?
With a bit more information, hopefully we can help work out whatever's going on!
