I got my tongue pierced 4 days ago and it's at a slight angle and there's a dent like hole under the top ball on my tongue I'm not sure if it's because my tongue is still swollen or because I have a really short thick tongue? And also can the dent go away?

TONGUE PIERCING AFTERCARE (http://www.bmezine.com/pierce/articles/ptafter/tongue.html)

It says here that the worst swelling is in 2-5 days after the piercing. Sounds about right. I went through that with my monroe piercing. I also had a dent on the inside of my mouth. All gone now.

Is the dent red?
If not then it is probably just where your tounge has swollen to the size of the bar and the bottom of the bar has left a small mark,
it should go soon enough :)

Well I would like to ask. My dent is at the back of my barbell and I have had my tongue done for 5 days nowt and most of the swelling is gone, will this every go away because why friend also has her tongue peirced and her dent hasn't gone away and she has had hers done for about 5 month I would say now?

It's normal. I've had my tongue ring for over a year and my tongue still has that indent where the ball sits.