Night time bra?

I believe I'm the only woman whose boobs actually flop about. When I lie down they flatten out. When I lie on my left side the right breast flops over onto the left. It tries to get in the bra cup with the left breast. When I lie on my right side the left breast flops down into the right bra cup. 
I think my underwire bras (which I have thrown in the bin) might have been able to corral each boob in its place, but these post surgery bras are useless when sleeping. Can someone remind me why I'm wearing them?

Its been 4 weeks since my lumpectomy and I went the post op bra during the day and change over to the R Bra type of a night.  Initially each time I took off ANY bra my affected breast felt sore -  I felt like the new adhesions were tearing or something as the book dropped to normal position.  So I found it more comfortable to wear the comfy droptop type r bras.  Together with the exercises I thought my poor old boobs were starting to look a bit lifted. lol. maybe not - but ill ask oncologist when I start radiation what they think.  Mine are comfy and don't prevent me from sleeping - in fact may keep them more enclosed so I don't lay on them. lol. 

Hi @Bravo, I had a nipple sparing mastectomy with immediate silicone implant last August.  After I ditched the hook and eye straight jacket 8 weeks post op, I continue to sleep in a crop top. I'm a bit of a sprawler when I sleep (looking for the cool patch of sheet I think!) and I just feel I need that extra bit of support. Also, I was so relieved I didn't have any problem with my nipple rejecting after the surgery I'm worried I'll scratch myself during the night and not feel it as I'm numb.
It does feel good to get out of the surgical bra, hope its not too long before you can sleep more comfortably! Jane xx

@Bravo if its from Lumpectomy, I wouldnt think you would need to wear it beyond a few weeks. From memory with mine I may have worn it a week thats all. With my Mastectomy/recon Im 10 weeks post now and I only wore a crop to bed as per surgeons instructions, still am, its so soft and comfy. You could check with your Breast Care Nurse, but if youre feeling ok, Id take it off, or switch into a crop so you still have a little support but are comfortable and no longer restricted. M x

My night sleep in a crop top is like a security blanket - it's what you get used to and as @socoda said it is about protecting the new breast and keeping it in the anti sagging brigade - makes the other breast so jealous!

Don't know where the rest of my post went  - but I hope you get to be comfy soon.  Xx Cath 

Hi @bravo, I was told to wear a night bra for four months but mine was after a mastectomy with immediate reconstruction using an implant and it was to ensure the implant was supported and stayed in the correct position during the night. I did change over to a soft padded crop top bra after a couple of months just for comfort and am still wearing one of a night time even now because I figure if I've got an anti sagging breast I might as well look after it

I only wore one 4 to 6 weeks after mastectomy and reconstruction so would think you'd be okay by now. I moved to an aah brah style from 3 weeks as found the stretch still a bit much ...which was much more comfy for sleeping but gave a tiny bit of support.