Recurring fever. The recurrent fevers!

My son is 3 yrs 9 month old..since February, i am observing recurrent fever..i am mentioning the dates..On 17th feb, he got fever for a day only followed by loose stools the next day..then on 24th march, he again got high fever for 2-3 days with mild cold, and mild perineal skin eruptions...then on 29th april, he got high fever with stomach infection for a few days..then again on 9th may, he got unexplained fever which lasted for 24 hours, during this time he was around a lot of kids and had very less sleep as he was involved in playing...If i talk about my child..he is on the run 24 hours..he cannot sit idle, feels tired very rarely, is superactive..has started eating a little less since the beginning of hot summer days as he fills his stomach with water first..pls tell me should i get any tests done as i am very worried about the recurrent fevers