I'm sorry for the loss of your mum. I hope you're coping OK.
I've noticed that bereavement sometimes does change people's perspectives on life and their aims for the future, especially if the death was of a parent or someone else very close, so it's natural you'd be rethinking your degree choice. Just make sure you do some thorough research into all the different options and don't act totally on impulse.
As others have said, graduate entry medicine is very competitive, some courses still have A-level and GCSE requirements, and others won't accept paramedic science as a relevant first degree. The grad med programmes that don't consider A-levels and accept any degree tend to have higher GAMSAT/UCAT requirements. So if you're not in a position to apply for standard undergrad medicine now (and you might be eligible for a medicine degree with foundation year if you have a good set of A-levels in non-science subjects), it would be much more practical to study the necessary A-levels and then apply. Otherwise you're just postponing the problem. You don't want to do a whole degree and find you still aren't eligible for any courses.
If you don't want to study A-levels again, make sure you choose a degree you're likely to enjoy for its own sake. Don't pick something because you think it might lead to medicine. If you do paramedic science, it should be because you think you'd be happy as a paramedic. Otherwise you could end up with a job you don't really want.
Finally, remember that doctors and paramedics aren't the only roles out there. It might be worth looking into other healthcare professions too, and seeing if anything grabs your interest.