Why does it hurt?

Recently when my boyfriend and I have sex ive been experiencing pain when in this position

We’ve done this position in the past and it’s never hurt before. But the past couple times, when he goes deep, I have to stop him because of the pain. It’s a sharp almost stabbing/pinching pain and I’m assuming he’s going too deep and hitting my cervix?? I’m not sure though because we’ve never had this problem until recently. We’ve stopped doing this position, but Is this something I should be concerned about?