Boyfriend can't cum anymore 😓

I'm 36 weeks pregnant and no matter what I do I can't get my boyfriend to cum, it never used to be a problem he would always cum so easily but now no matter what I do sex oral sex absolutely nothing will make him cum, I feel as though there's something wrong with me like I'm not good enough anymore(even tho it definitely seems like he's enjoying it) 😭 I don't know what's going on or why this is happening someone give me some advice because it's really weighing on my mind 😔