sex drive down, help!🙈

So I've noticed lately that my sex drive is just not as existent as it usually is. It's become harder for me to get wet or aroused in general, & I don't know why! My boyfriend & I have been having to use lube to get me started, & once we get going it feels wonderful like usual & I'm able to get into it & my body starts getting wet on its own, I just have no idea why I can't get wet on my own at first, or why I haven't felt horny lately? Should I see a doctor or something? Is this normal? I read somewhere that birth controls can lower your sex drive, could that be it? Any advice, please?🙈