Hello, I Too Am Experiencing Pink Saliva When I Spit.

Hello, I too am experiencing pink saliva when I spit. I currently am on antibiotics to clear and infection behind my ear and neck. Please note that this "pink" was there prior to the antibiotics. Rythromicin and clindamycin for about 4 days now with 3 more days on one and 6 more days on another.
I am 43 yrs old, and this is concerning me.