TMI - DH having pain during intercourse

Madison • 27 & Married. TTC#1 with Endo and PCOS
Last night my DH told me it's been uncomfortable for him when we have intercourse. He said that it feels as though the tip of his penis is "hitting something" and that "there's pressure" on the tip and feels it worse during ejactulation. He said it used to only be in the doggy style position but the last few weeks has felt it in any position we've used. 
I'm wondering if it's my cervix that he's feeling? We've been together 4 years and I was only BC for 3.5 of those years so the past 6 months my cervix has been moving more throughout my cycles. That's the only thing I can think of?
Anyone have this issue?