Go to another doc.

No I would not consider 99.7 a high temp. Your temp can vary thru out the day and evening. Your doc may think you may have a bug/virus. If that is the case, there is no medicines for that. No antibiotics will help a virus. If you continue to e sick, have a higher temp, say 101 consistanly... I may go see some one else. ;)>

Prolonged high temperature needs to be addressed. Go for a second opinion.

my wife has a problem wiht incompetent doctors... with how many normal people they see they stop understanding that healthy for normal might be really unhealthy for someone else. if your temp usualy measures at 95, then 100 is likely equivilant to 103. there are things which can effect how your temperature reads if you are a mough breather then evaporation will make your oral temp low. some peoples body distributes heat differently, my oral temp takes at about 97 but I generate so much body heat that on nights when I do not sleep in our bedroom, the room is like 2-3 degrees colder. I have by holding a womans hands between mine warmed her back up to comfortable when she was starting to feel sick. but my feet are always cold *sorry, ADHD tangent :)* I get so tired of doctors who say "test came back clear, have a nice day" my wife has actualy been written off by the local hospitals as drug seeking... on 2 separate occasion she has recieved blood transfusions durring the same day of being brushed off and sent home by a local hospital. there is a thermomiter that takes a true core temp called jonah, I do not know if it is approved yet but it is a pill you swallow that transmits to a hand held device, if your oral temp comes back flawed maybe you should look into that.