I found it very hard to think about what I wanted to do because I think I had given myself over to the DH and the DC, they demanded so much from me because of their ages and various SNs, DH because of the business etc.
I did little things at first, took time out at the end of the day to have a long soak in the bath with some lovely bath bombs/melts rather than a very quick shower in the morning, tried to find time to lose myself in a good book etc. I also got my hair done more regularly because, unlike clothes, you are always "wearing" your hair and if it looks good it does make you feel better.
I have and still am thinking long and hard about what I truly want to do. The logistics of the DC means I can probably only work for DH (DC being ill, appointment for here, there & everywhere etc) for the timebeing.
You have to think back to what you enjoyed doing in your childhood/teenage years, what made you happy then ? For me, it was horseriding, use to have my own horse up until DS1 was born but i didn't actually start doing it until 14/5 months after the affair.
FWIW I think your counsellor was right to suggest you have a break from work. I know mine suggested it in front of DH to make him realise what he had done and the impact it had had on me and I wasn't "fit for work", I wasn't fit for anything at the time, it was all I could do to keep the DC fed, clothed and watered! There are times now where I still want to run screaming for the hills, to get away from everything which is why the riding has been a godsend, gets me out in the fresh air and away from everything.
I have a friend who designates one day a week to herself whilst the DC are at school. On that day she does no housework at all, she may only read a book or go window shopping or even sleep during the day (setting her alarm on her mobile) - she really has the right idea.
Sorry for the ramble, hope it helps.