Hey, there’s no evidence to support that birth control can disrupt future fertility, this is a common myth.
Unfortunately, there’s no way to test fertility when on the pill as it essentially prevents you from being fertile (ovulation) whilst you are on it, so the only way to find out your own fertility level would be to stop taking your birth control and start taking ovulation tests, but you would have to use a different method of protection in the meantime.
I wouldn’t worry about infertility too much if you have no real reason to, it can be caused by other conditions, so if you have anything else going on it would be good to get checked by your doctor. But if your general health is fine, and you have no reason to believe you are infertile, I would try not to worry about it too much xx