I am on levonorgestral birth control pills from a pharmacy in mexico.my period is very light but on schedule with the pills. Is there any other way to know for sure if the pills are legit or is this assurance enough?

Where are you at Mexico?

If you live in the US, then you know they legit, if you have a prescription from your doctor and buy them at the pharmacy.

If you are ordering them though the mail, then they are not legal to start with. So if a company is willing to break the law by selling prescription drugs without one, if they are willing to break the law by importing drugs illegally,

Do you really think they care about the quality of the drugs ?

There is no way for you to be sure at all.

Also even if they were real and even if they were exactly the same ones as made in the US under FDA control, they are not 100 percent effective