Hi choc have a browse thru our high needs thread v, see if any of these posts sound familiar to you. My DS is high needs and ALWAYS fights naps, even now and he is 12mths old, so you have my complete sympathy. (he has just learnt to STTN, 2weeks before he turned 1...!!!!)
The relentlessness of the constant nap battle is horrendous, time consuming, creating fatigue for both of you. It also made me anxious a lot which of course made DS even worse! That 4,5 mth age was the absolute worst for me, I actually got so desperate I rang and org sleep school.
For me it was a combination of teething, reflux, developmental milestones, super alert baby becoming aware if the world around him (I had to make the room darker and darker, and darker again, lot sof white noise loud etc etc... Everyone thought I was bonkers but I couldn't care less I was drowning in stress and sleep dep!)
Hangin there, it will get better, but you need to survive in the meantime. So do woteva u can to make it easy for yiurself... As in, get help cooking dinner, doing chores etc, because u need rest and timeout to recuperate so u can cope during those long days...
Chck out the high needs threads... It may just be a comfort to know there are other people going thru similar situation. Promise it will get better, just not yet!
Do you have a swing (motorized) that u can use for naps? Maybe good way of transitioning her from pram. See troublesome tots website too. In hindsight I wish I had bought one, cos I realise now, I was fighting naps so much because DS was such a crap sleeper, and the swing could've at least helped him catchup on much needed sleep otherwise u r in that endless cycle. (sleep begets sleeps, rested child not so cantankerous)
Take care 