If you can manage it with your hearing problems, Jennyjoan, call the out-of-hours GP service and tell them that you're concerned about the ongoing headaches after a fall.
The number for North & West Belfast is 028 9074 4447. For South and East Belfast, it's 028 9079 6220.
The Cinnamon Trust exists to help elderly people with their pets if they're unable to cope (e.g. by providing volunteer dog walkers). I'm a member and I do know that they operate in Northern Ireland. Try a phone call to 01736 757 900 to see if they can put you in touch with someone who can help you. (Alternatively, you can use the web form here but I think that a phone call might be best, if you can manage it:
https://cinnamon.org.uk/contact-us/ ).
I hope that you're feeling much better soon.