RN of almost 23 years here. (Most of it in surgery ICU)
The liver is a very bloody organ. And an obese person has a bigger and slippery organ.
That said, liver biopsy involves a cut and a chunk. The put a little 'glue' on it and send you on your way.
You will be fine. Any uncontrolled bleeding would have manifested already.
As someone else mentioned, it is a known risk and was on your consent that you signed.
Good luck and take care!
"And the day came when the risk to remain tight in a bud was more painful than the risk it took to blossom. " -- Anais Nin
Revised from Band to Bypass 10/26/09
High Wt 355/ Surgery Wt 343 (BMI 61) / Current Wt 190 on 3/17/12
TT/Fleur De Lis 8/22/11
Mastopexy and Brachioplasty 12/14/11