Re: fever in 6 month old...this is day 6
All 4 of mine had temps when teething. Since your baby is 6 months, you can double up and do Motrin, then 2 hours later, Tylenol, check if your Dr. if you would feel better before you do this. I much prefer Motrin over Tylenol, it lasts longer and seems to work better.
High fever in a child under 12 months lasting longer than 96 hours normally will be prescribed an antibiotic, just in case, even though high fevers are usually viral rather than bacterial. I just went through this with my 9 month old, it was a solid 8 days of fever (they put her on antibiotics on day 4).
Baths work, like the other posters said. Also, take her outside, fresh air does wonders. Dress her appropriately for the weather, but some time outside can be beneficial, even if it's cold.
Hang in there, sick babies are no fun.