I agree with all the above replies: It’s difficult to give clear advice as your post is quite vague.
Are you sure that this noise is an intentional vocalisation and not a sound associated with breathing? A squeaking noise whilst breathing is a sign of a respiratory problem.
The other noise to be concerned about is crying to be fed. Is your bird eating well by itself? You may not see it eating, but if it’s pooping, then it’s eating.
Here’s a link to a video I found to give you a better idea of common sounds to hear, though as others have stated, your bird could be simply mimicking a sound heard previously.
Budgie sounds and their meaninngs - YouTube
* Edit - Just like to point out that I chose that video link as it was the best I could find that was capturing common vocalisations. However, there are also some things in the video that I don’t wish to promote - Talkbudgies doesn’t recommend housing mixed species together (finches & budgies in the clip), and we advise the use of natural perches rather than dowels (or coat hangers). Also, I feel that some of the terms he used to name the sounds were misleading (ie. the ‘squabble’ sound, isn’t the sound made when they are squabbling, it’s a happy noisy chattering that just reminds the poster of people squabbling).
If you still have any concerns then a vet visit is advisable.
If you feel that it isn’t a medical issue and are reluctant to make a vet visit, but would still like some reassurance, then if you could record and post a video (there is info on how to do this in the stickies), members could have a much clearer idea of what you are describing.
Welcome to the forum