Hi and thanks for the query, It is worth noting that colds are generally caused by viruses and could be associated by intense fatigue. However, bacteria could be involved, especially when the fever becomes very high and stable, and the general health condition deteriorates. I suggest in your case, persistence of symptoms in case symptomatic treatment fails might require a more invasive approach to ascertain the cause and severity of disease. for how, Acetaminophen., Vitamin C in the morning and Saline to wash nostrils might be sufficient. Persistence will require a full blood count in search of raised neutrophils for a bacterial infection , or a chest X ray. The pain in the abdomen could be a simulated presentation of lung infections, which in some cases might even present themselves like abdominal surgical emergencies. However, an abdominal examination to ascertain common diseases like gastritis, especially if there is a past history of such a pathology is very appropriate. I suggest you consult you consult your family physician i case symptoms persist or aggravate. thanks and best regards, Luchuo, MD.