DD is just under 9 mo. We generally sleep tummy to tummy with my arm wrapped around her. Usually this means that her head is resting on my upper arm because (1) it feels wrong to have her head in my armpit and (2) it makes it easier for her to latch on in the night. Is it okay to support her head like this? I keep worrying in case I permanently kink her spine or something. PFB, in case you hadn't guessed