I took the monday pill in the silver section about 6 hours later than normal. i was sexually active in the 48 hours prior. could i be at risk?

Low risk: I’m not sure what brand you are using and what pills are in the silver section. If those are the last 7 days of the package, they are placebo and would not have any impact on risk. If in the center of the package, risk from previous sex is negligible if the other pills were on time, but there is risk for the future until your next cycle, and using back up protection is recommended.