Sorry to hear lots of you are having trouble with your LO's sleeping overnight now ... I don't have any words of wisdom, we don't seem to be at that stage yet.
I did question with the HV as my LO seemed to be very fidgety at night, like he was moving frantically but not awake. She said he was possibly practicing his movements, so I've just left him to it, initially I was waking up and trying to settle him but it didn't seem to do anything he just carried on regardless.
We've always put LO into his cot awake or on the verge of sleep, have never swaddled etc and he doesn't seem to have any trouble going to sleep.
Our LO's toilet has also become quite smelly, and it also changed colour, but I put this done to having to put him on special milk. Again checked with the HV and she said all was normal.
I know it's hard, and easy for me to say, but just preserved, try something different or what others have suggested, it's worth a try.
If anyone has any tips about getting LO to nap in the day more I'd love to hear them as that is our downfall