Hello. I remember your other thread, but I didn't post - I noticed it because I recognised myself in it! It struck a chord with me, as I had post-natal depression as a result of an OCD-type disorder which was at its worst just before and for several months after the birth of my DS. Worrying about his flat patch was one of the things that plagued me during this time - I am not saying this is the case for you, but it did cause a lot of needless anxiety. He DID have a slightly flat patch and like you, I kept taking lots of photos, convinced it was bad and feeling awful that I had let it happen to him. Everybody else either denied being able to see it, or said it was extremely minor and not noticeable. Anyway, I worked hard at repositioning and it resolved itself. If it IS a flat patch, which sounds unlikely if even you aren't sure, then be assured you've caught it really early and you should easily be able to make sure it corrects itself.
- when did you first notice it? I suddenly noticed it when DS was 4 months (having spotted it in a photo), and immediately panicked.
- at what point was it at its worst? At the time I noticed it.
- what did you do about it? Repositioning. I won't lie; I really obsessed about it, and made sure he never spent any time on his flat patch. I bought an angular pillow thing which helped DS sleep on his non-flat side, and I slept next to him, on that side, to encourage him to stay turned towards me. I held him in my arms the other way round so there was never pressure on his flat patch. I also did lots of play with him to encourage him to look to his left (the non-flat side) as he had a preference for turning his head to the right (the flat side). I also did loads of tummy time with him, which he didn't like much, but tolerated in small sessions.
- did it get better? All the above things worked. By the time he was 7/8 months, it was barely noticeable. I even have some really good before and after shots! Now he is nearly 3 and has a symmetrical, rounded head.
If I were you, I'd concentrate on repositioning for now, and wait at least 2 or 3 months. I bet you will find that it is resolving itself nicely. If not, then you still have plenty of time to organise a helmet.
Oh, and another thing to put your mind at rest - more recently, when looking at photos of my husband as a baby (PIL were comparing him with DS), I noticed in a couple of photos that he had quite a flat head. Later I looked at DH's head from above and realised he's quite assymetrical and still has a flat patch on his right side!
So, I married him and had a baby with him before I noticed it (he doesn't have long hair, and we are the same height, so it's not like I didn't have the opportunity). Even knowing it's there, I still don't think it's noticeable at all. So on an adult's head, I think it must be very rare for plagiocephaly be noticeable.