I am current having chills, but i have run a slight fever (just based on feel, not an actual thermomoter) since an injection. The pain has gotten worse over the past 72 hours, and it is slightly swolen, and feels warm to the touch at the site. I have used this exact product before without problems. Its test ethenate so its not like it is a short ester. At what point should i suspect an infection? Should i go to the doctor now, or tomorrow if it has gotten worse or should i just tough it out?