<s>[INST] Hi! I was supposed to get my period the 24th and I had intercourse the next day and there was light bright red blood on my partners penis. Almost like blood from a cut and how fresh it is. Yesterday, I started feeling really weird and took 3 pregnancy tests and they all came out negative. I took a nap and woke up and puked 4 times. All throughout yesterday I had diarrhea. Last night, I had a fever of 102 F and I ve been very tired and light headed. I m still feeling lower abdominal pain as well. It feels like a stabbing feeling. [/INST] Hi. The symptoms of fever, diarrhea getting tired light headdress and all are due to gastroenteritis. Get a proper examination done by a Surgeon and get an appropriate prescription based medicines. Take plenty of oral fluids, soft diet, curd and banana, probiotics. Bleeding after sex could have been due to the normal menstrual period as your pregnancy tests are negative. This can be enhanced by the congestion caused by gastroenteritis. The water-borne infection has to be recognized so that you can avoid this in near future by using boiled and cooled water. Consult a Doctor to see for the vitals like pulse, blood pressure, temperature, level of deny Chat Doctor.  </s>