My baby is 15 weeks old and still sleeps swaddled. We used a love 2 dream when she was very little, moved onto Velcro swaddles at about 6 weeks and her sleep drastically improved. Now I am conscious she is close to rolling and she can break out of the swaddle / bring her hands right up to her face and wakes herself up.
I have bought a love 2 dream transition swaddle and we have used it for daytime naps with no problems (she only naps for 30-40 mins generally anyway) but the one time I have tried it at night she had 3 hours of broken sleep and then got so angry and overtired that I gave in and swaddled her 
She uses a dummy and will either knock that out or just bring her hands straight to her face. Either way she wakes herself up repeatedly. The love 2 dream allows her to do this as well (to a lesser extent) and she wakes up.
I am desperate to get her transitioned into arms out sleep but I just don't know the best way to do it, without jeopardising her generally very very good night sleeping. I also have PND and am very affected by sleep deprivation so I am very anxious. Does anybody have any tips that would help me please? 
Thank you xx