help!!!

Cat 😻💗💞
Okay 12:50 am my son just randomly got hot!! I felt it right away when he started acting wired I just know my baby his 1 year old an 1 month. So when I checked his fever it was 99.9 okay so I said he's sick but not bad I'll wait 20 minutes to check again then I did, jumped to 102.03 I checked twice he's starting to cough an he's getting hot!!! I did just try to take it down with a warm bath I don't think it helped. Should I take him in or should I wait in getting a little worried that it will get to high hate my baby being sick 😷