Oh my goodness I cant imagine rosacea flares already already so difficult to deal with plus being pregnant, I hope this helps! The pillow for my neck is actually a knee pillow, it sounds weird but it fits my neck and holds my head in place. I sleep on a 12 inch memory foam wedge also so I’m propped up, I have a low fan that blows on me to help with flares too. I hope this is able to help give you some relief too!

https://www.amazon.com/dp/B07MFN8FRT/ref=cm_sw_r_cp_api_fab_rcBGFbSKAFY9B

Sure

So it’s actually a knee pillow BUT the contour fits my neck and holds my head in place, it seems strange but it works well! I also sleep on a 12inch foam bed wedge so I’m propped up somewhat. I hope this helps you too! https://www.amazon.com/dp/B07MFN8FRT/ref=cm_sw_r_cp_api_fab_rcBGFbSKAFY9B

this pillow helps me a lot (to the point that i bought one for every room of my house i use so i never had to think about finding one) if it's helpful to you but also look up dancer's hip or snapping hip syndrome as that's really common for us and is currently what i'm dealing with as described by my dr.