something new sinus infections

A.J. was running a fever of 101.5 at daycare and brought him right to the docs. At the doctors he had a 102 fever he felt like he was on fire. We found out with his runny boogie nose is that he has a sinus infecton and he is on antibiotics and tyenol for the fever. He had a cough a couple weeks ago and the cough went away. We associated the cough and boogie nose with teething, His first tooth came and more are coming but the fever threw us.  Now I see the signs he has been showing for the last couple of days, sleeping on his side instead of his tummy, extremly unhappy flat on his back for certain amount of time, and protesting against the jumperoo. never seen this topic and though I would throw it out there.