I was prescribed doxycycline hyclate for five days and doxycycline mono hyclate for 2 days for insurance reasons. Will this treat chlamydia?

Not necessarily. I usually prescribe doxycycline (do not take of you are pregnant) 100mg orally twice a day for 21days. That usually cures the infection. It would be wise to talk to your physician and tell him/her that you received a second opinion and what does he/she say.