I had the stomach flu about a month ago (fever, chills, vomiting and diarrhea) and a UTI. I have had mild stomach pain since. Now I have liquid diarrhea again that has a chemical smell and is liquid yellow. I woke up with stomach pain around my navel on the right side radiating around into my back and I feel like my groin lymph nodes are swollen along with feeling weak and have a little nausea. My stomach is bloated and rumbling. So bloated and swollen feeling. Lower back pain too. I got an antibiotic shot last month. Should I see a doctor again? What could the diagnosis be? Thanks