Help! I'm about to jump out a window

Our daughter is extremely clingy through out the day, you CANNOT put her down in her swing or crib without her screaming and crying. Even when we hold her unless we're walking around with her she will not stop also she barely naps anymore, but that's not our biggest problem she used to sleep perfectly through the night from 11pm-7/8am however now she wakes every 2/3 hours screaming bloody murder. After changing her and trying to feed which she refuses most of the time she'll still scream and cry for no reason at all. We're trying the cry it out process and she can go on screaming and crying for 30/40 mins. Nothing helps at this point were exhausted, I want to fling myself out of the window and husband doesn't know where to hide from her...help please this has been going on since a week now.