Please help me!!! Female cherry barb trouble

no but hemorrhagic septicimia (basically a bacterial infection of the blood causing small blood vessels to leak) is. both could be a result of bacterial infection.
 
Gotcha...she is fairly new to the tank..is this something she could have had for a while (like before I bought her 3 weeks ago)? I am concerned that even though my water quality is fine, that I am missing something that I am doing wrong.
 
it definitely could have been something she already had, and due to her 'past life' or genetic weakness she is sick from it while the others are not, or they are fighting it off better than she is.
 
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