Hi Stefka,
I think I have written on a couple of your other threads about day sleeps, crying and so on. My DD2 is 17 weeks and a couple of months ago I was the one starting threads about her refusal to be put down. I just wanted to share my experience- it runs somewhat counter to the overall tenor of the advice you have received here but as someone said above, the same route doesn't work for all babies. Neither, importantly, does it work for all mothers, which is a factor that is often overlooked IMO.
I tried the sling/ cuddle or feed to sleep route but after about 12 weeks DD2 refused to sleep in the sling and got distressed at the very sight of it. (I now have 4 slings, accumulated in a rash of enthusiasm, gathering dust in a cupboard!) I also felt encumbered by it when trying to play with DD1 and, to be honest, just wanted her to go to sleep in her cot. At that stage I began putting her in the cot and leaving her to cry for a bit (and I mean proper crying, not just grumbling). Yes it was horrible but the choice was made somewhat easier by the fact that she cried whatever I did (pick up/ put down; swaddle/ no swaddle; feed/ no feed etc). And I discovered that she would only cry for around 10 mins max then find her thumb and fall asleep.
5 weeks later, I have just put DD2 in her cot awake but needing to sleep (she doesn't really do 'sleepy' in the sense of drowsiness but gets more agitated when tired). She cried quite loudly for 5 mins then dropped off. She now has 3 x 1 hour naps in her cot every day and wakes happy. I still don't like to hear her cry but if I go in, stroke her, pick her up etc (which I do if she is taking a while to go) her crying intensifies. I honestly think she needs to be left alone to go to sleep. DD1 was the same (although I forgot that until my mum reminded me last week) and she is now a champion sleeper.
I know leaving to cry isn't a very popular approach on MN but you have to find a way to get through your day that works for you, DH and siblings as well as the wee one. Personally I could not spend upwards of an hour stroking DD2 to sleep three or four times a day (and n times a night), and I don't think it would help her much either.
This isn't 'advice' because I don't know you or your baby so don't know what suits your personalities. And I'm not criticising the majority approach either, just trying to point out that there is more than one way to crack a nut
Good luck!