I have the same issue! I'm female, and had to have my gallbladder taken out! Now when I urinate, the smell is awful! So strong! Drinking more water doesn't help! I'm afraid to have sex because of this! I haven't been to a doctor yet,but I will if I can't find a reason why this is happening. I never had this problem before!
Dark urine is probably from bilirubin which came from blood and it came there from liver, because it was not able to be secreted into bile duct, because of stones blocking your bile duct. This is one possibility. First, you need urine test, next an ultrasound of bile ducts, or MRI.
Burping may be either from H. pylori infection of stomach (common), or from regurgitation of food from duodenum into stomach, what may happen after gallblader surgery. Test: breath urea test for H. pylori. In meantime avoid acidic foods and fruits.
I just wanted to add that I'm a 26 year old female. I have other things going on too. My skin has become really itchy. I got a rash on foot. My breath is horrible and coated white. It wasn't like this before I had the gall bladder removed.