I'm not sure where you are located but most public hospitals have mental health services where you present, go through a quick assessment and then they decide urgency of psych and appoint a regular counsellor prior the appointment. It will cost you nothing. Whilst the private system is good, the resources can be limited. So keep this in mind.
As to exercise you might be able to have a referral through your GP to an exercise physiologist under a GP management plan. I did the elderly program during chemo...it was all I could manage. Also check out ywca encore program (look up online) and see if running locally...that was great.
It must be very challenging for you having to do this again (yes...an understatement ). We are here to listen. Kath x