Firstly what a great section of this wonderful forum and great timing!
I have recently been at that stage of doubting myself and when I noticed this section fri/sat it was such a relief.

Juliette, my daughter is 6 months on the 28th and still waking every 2 hours during the night plus shes usually restless from around 5 amish, sometimes earlier. Shes doesn't like to sleep during the day either and is very alert. My son was the same (hes 11 now) I succumed and put him on formula and solids early and he still kept waking every 2 hours untill 6 months or so. I vaguely remember my cahys nurse saying to me, once you get his day sleeps sorted the rest will follow. I'm pretty sure this helped with my son. That said it might've been easier at that age (6 months) as I still havn't got her into a routine. I suspect its the growth spurts that get in the way so I'm hoping once she has her 6 months one over and done with she will settle. I did get her day sleeps going really well when she was just over 2 months which improved her night sleeps but it only lasted a couple of weeks, then bang back to square one and no improvement since.

After starting to get that extra sleep I found it harder to cope with the nights. Also she started getting harder to settle where the boob was the only way and unless I waited untill she was fully out of it she would wake the moment I laid her down in her cot which is beside my bed. It can take over an hour to get her in her cot at times so for most of the night now she is usually in bed with me. This I find much easier on me, I get more sleep this way, I have her in her grobag and have just started using one of those anti roll pillows.

I bought my son up the same way (co-sleeping, not leaving him to cry etc..) untill I gave in to the pressure and did the controlled crying when he was about 3 and having trouble in his big bed (he slept in his cot fine I think). Yes it worked and I thought it was the right thing at the time, I'm not sure now. I did try everything else first for several months before I bit the bullet.
But anyway the reason I mention it is if your worried you are spoiling her because of what peole tell you my son turned out to be a very sharing kid ever since he was able to say 'ta' and is very mature for a kid.

Last week I nearly let peoples comments get the better of me, read all the boards I could which all talked about controlled crying and I put her down in her cot one afternoon, settled her then left her for just a minute to test her, the poor thing cried so much in that time she spewed just after I picked her up and I just knew I could never do that to her and then I saw this new section which confirmed that I was doing the right thing..

Both of mine were also really windy babies with 2 differences, she vomits alot though much better now and instead of vomiting he cried in pain alot, I found the best way to cope with them being so demanding was to put myself in their shoes and not take it personally. I find if I do that I cope much better.