Hi and welcome to the forum! I am glad that I can help you.
You would like to know what causes bloating and what you can do about it.
Individuals experience bloating and gas usually due to diet. Consuming sparkle drinks may cause air to be collected in large amounts in the stomach. If this air is released by burping, it continues in the bowels and causes bloating. Consuming food like beans and cabbage, which are considered a little difficult to digest, may cause bloating and gas as well. Sometimes eating habits, such as eating fast and swallowing air while eating, may be the cause of the bloating.
According to the data that you described, abdominal pain, needing to go to the restroom, bloating and gas, may or may not be related to any medical conditions. People may experience these kinds of discomfort during holidays, such as the days before and after New Years eve. If you experience these symptoms a few days more, you may consider seeing a gastroenterologist for further information about diagnosis and treatment options. If you experience gastrointestinal bleeding again you may consider seeking medical help immediately.
Please consider that I provide medical information only. I am not able to diagnose medical conditions online. Please contact your doctor or other qualified healthcare provider such as a gastroenterologist for further advice and information about diagnosis and treatment options.