Sick baby

Ma

My 9 month old has had a fever for 2 days, and is now having body aches (he cries when he tries to turn from Back to stomach, and when I pick him up.) he did get COVID Tested yesterday, his highest temperature was 102.3. yes I took him to the ER & got 0 answers since he did get tested, etc. Do any mommas have any advice? he’s crying frequently and taking short naps, his temperature has decreased to 100.8 today. Tylenol has not helped, I will do anything to make my baby feel better. 😔