Ruby it's very early days after you lost your dad and have had such a stressful time - it sounds like everything is having an effect on your already compromised health. Night is always the worst time to cope especially if you're on your own so the advise you've had is good. It probably helps to come on here as well to vent your feelings - maybe even write down everything going through your head even if it's only on something you don't post. I've been through some pretty bad nights too - the loss of a business, the worry of losing my sight and other family related worries - everything seems magnified in the middle of the night and you feel desperately alone. When the sun comes up it often doesn't seem quite so bad but it's doing to take time for the pain of grief to ease a little. Be gentle with yourself and try to remember your son is also coping with his own worries too - not least of which is probably having to leave you on your own when he goes to Uni. Take care 
No fun being old under Andy Burnham .
Struggling with estrangement from 2 adult children and dont know where to go from here.



