*Bella*, 
I have been training for seven weeks for a 5k on October 13.  I started training on August 3rd or 5th, I can't remember the exact date.  That was the first time I really started doing anything seriously.  I started jogging in April but quit around the end of the month, only after two weeks, because of a knee injury.  Anyway, at that point in April I could only jog for a 12-minute mile for 20 minutes straight, and then I was beat.  I took three months off because I wasn't dedicated, nor was I serious.  Anyway, when I started in August I had to work my way back up.  And as of three weeks ago I could run 3.1 miles (5k) at a really slow pace, huffing and puffing.  Now I can do 5k on flat, even terrain in thirty minutes.  And today I ran the course of my race (1 mile up hill, 1.25 miles flat, and less than a mile down hill) in 34 minutes, but I was also talking to my running partner as I ran.  
I'm not telling you all of this to brag, but instead telling you all of this because the strides I have made as a runner or with fitness have made me feel so awesome about myself.  I feel if I can do this, I can do anything because I have lead a very sedentary lifestyle up until now (I'm 30).  And also, if I can do it, anyone can do it in a matter of time!!!
Congratulations on taking on the C25K.  I did a sort of modified version of it or a speedy version of it.  I was doing the 8 week plan but ended up making more progress in a shorter amount of time.  
You can do it!
Tamara