I studied biological sciences for my undergrad and I'm now doing a masters in reproductive biology. I think there are lots of opportunities for further experience and education after undergrad but I'd just say have a search for careers that might interest you. I'm hoping to apple to the NHS STP and get a job that way. Maybe you could look into andrology and embryology if lab/clinical science interests you.
Also, if you're genuinely interested in medicine, I believe there are opportunities to apply to a reduced course after studying a relevant course at undergrad.
It's hard to figure it all out but remember that there are lots of options and opportunities!