Oh hun, im so sorry things are rough for you at the moment, i can only imagine how difficult it is with twins. lets try and see if we can help you out here
you say that Dylan started waking 20-30mins into naps, this is usually a sign that he has had too much A time before the nap and is OT. however before we go there could you answer a few more questions:
* is it possible they have reflux?
* do you swaddle, have white noise, room darkened?
* do you use a paci?
* any medical issues?
* do you raise the mattress of the cot slightly?
* do they sleep in their cots?
Ok, first of all, dont beat yourself up about doing CIO, you are trying to do the best you can do here. but i do encourage you not to do it again, it will only make things worse in the long run. CIO is not even recommended by the "experts" until 6 months old. also Tracy advises not to do Pu/Pd as its not meant for babies under 4 months old, its too stimulating for them and will only work them up more.
are you able to tell me how your day goes at the moment in some sort of EASY format? more specifically how long they are awake before you attempt to put them to bed
Please also remember we will be using their corrected age for A times etc so we will be working with a routine for 7 week old babies