Struggling with Asexuality and Birth Control

Hello! Since I’m young I have never been interested in sexual intimacy of any kind but sort of just did it because i “needed to” I have never enjoyed it much. But as I got older I did have sexual intercourse that I enjoyed but again it wasn’t like I needed to I just did it to do it and honestly could go the rest of my life without ever doing anything. I started dating my boyfriend and we had a healthy sex life. I decided to go on birth control and 6-12 months into it my libido that I did have was completely destroyed. At first I was still able to attempt it but it would start to hurt even if I wasn’t dry. I now can’t even force myself to have intercourse. I don’t get any urges whatsoever. My boyfriend is as supportive as he can be but it is a hard topic for me. I definitely feel like I have always been somewhat asexual but I cannot figure out if there is also a greater issue here? I have been to 3 gynecologists and they told me I “looked perfect” and that it was “all in my head” but I feel like there is a greater problem here. Sorry for the rant.