HUGS!! This is such a hard stage.
My girl was just the same - she would scream/cry each time I put her down and I could only get her to sleep in the car/buggy. To cut a long story short, I discovered it was silent reflux and we spent many days at the Waikato family centre and they helped me with settling techniques and a strict feed/play/sleep routine.
I have learnt that babies need their sleep. It was a really hard time with lots of crying (both her and me) but she now settles herself to sleep, but will still only do 45 minutes (1 1/2 hours if I'm REALLY lucky) but I've learnt to live with the short naps, but at least she's having sleep!!
If you are interested, Maureen at the Family Centre is soooo fantastic!! They saved me and made me realsie that being a mum is enjoyable and I now have them to thank for such a settles baby on a good routine.
PM me if you want her phone number
Hope this helps