Dear Liztyndall, hello.
Thanks for writing in.
Burning sensation in urine can be due to Urinary Tract Infection
. It may be associated with nausea
,headache or backache
. As you were on vacation, the chances of urinary tract infection is more along with intestinal infection as you are having loose stools also. Drink plenty of water and take antibiotic under medical supervision so that it covers both urinary tract infection and intestinal infection.
Get your Urine investigated for Routine and Microscopic. If pH of your urine is acidic take Alkalinizing agent under medical guidance as it helps to treat urinary infection.
I hope this will be helpful to you.
Thanks and take care.