Toddler nap time/bed time struggles

My toddler (21 months) has always been a good sleeper. Even now (once he is asleep) he will sleep for around 11 hours (for the most part) and has 2-3 hour naps. Recently, though (the last week or 2), he is such a pain for me to actually put him for a nap or to bed. He is fine with my husband (sometimes he gets out of bed once or twice, but then he goes back to bed and right to sleep for him), but with me, he flat out refuses. He cries or screams or wants me to rub his back or stay in his room with him or just doesn’t stay in bed.

Any suggestions to make my life easier? 😂

Things to note: He has been in a toddler bed for about a month and a half (with no issues), he did get rid of his pacifier last week and (most notably) we have a baby on the way-I have a feeling this could be a big part of it.

Thanks!