I had unprotected oral and protected sex on a one night stand a while ago. 5 days later, I got a sore throat, runny/blocked nose and a few small mouth ulcers. Then 9 days later, I got a fever which only lasted a day and stomach pain, without diarrhoea. Symptoms completely cleared up a few days later, except the ulcer which lasted a bit longer. At 15 days, I had a duo hiv test which was negative and the doctor said I was not at risk. Since then, I've been getting sore throats and runny nose frequently but I do have a history of hay fever and allergies. Are these just cold or allergy symptoms?