Oh mumtobe, you do have such a way with words - seriously, you should write for a living. You are funny.
Of course, this situation is far from funny though, i just hoped that cheers you a little bit, you are clearly very bright lady who is struggling a lot.
I recognise quite a bit of myself in your posts, in terms of the depression/anxiety and insecurity. I don't however have a gym bunny DP. mine is more of a gym walrus! I think you need to go back to your GP and tell him how you have been feeling with the anxiety and depression. It is really important that you get some support, especially if you do have PND. I don't want to worry you (but of course it will) you are more likely to suffer from PND if you are prone to depression. So forwarned is forarmed. You need support in place, be that counselling or medication. There are some medications that are safe during pregnancy and breast-feeding. Yeah, booking yoruself a spa day will be nice, but honestly, that is a piss in the ocean when dealing with depression.
I am worried that your DP actually IS an arsehole (sorry, have read your other thread) and punching the wall (despite being frustrated) is really not on. How the fucking hell dare he. Maybe if he paid a bit more attention to you then you wouldnt feel so shit about yourself.
Your hormones are also giving you a hard time too so please don't be too hard on yourself. Go and speak to your gp or your midwife and tell them. Then they can help you.
and
you need to keep your strength up!