Pain during sex

Hello everyone! I’ve started taking birth control for about 2 months(I’ve just started my third pack) and after my first period on birth control I started experiencing pain when having sex. Mostly at the entrance. The thing is, that has never happened to me, ever. To feel that burning sensation and also hurting after I pee. It’s awful and the only thing that changed was the fact that I started taking birth control. I’ve noticed that the first time of the day when I have sex is the most painful and then it’s fine cause my muscles strech or idk. But if we’re being really gentle, I’m fine, BUT that doesn’t make the whole situation fine. Has something like this happened to you? Is it birth control or can it be something else? I’m also on a weaker birth control(gestoden 0.075 mg and ethinyl estradiol 0.020 mg), I’m also very wet(so it hasn’t affect that and the lack of lubrication is not the issues). Any advice please🥺