Am i good enough for medicine or oxbridge

Depends on which medicine course and which course at Oxford or Cambridge. They all assess GCSEs differently.
Your GCSEs are very good in context, and also not all medical schools even score GCSEs (e.g. Imperial, UCL, and others just require minimum grades in English language and/or maths, and otherwise don't look at your GCSEs).
Oxford and Cambridge weight GCSEs differently on the whole, with Oxford tending to put slightly more emphasis on them, but this also varies considerably between courses - for example maths at Oxford tends to put more emphasis on the MAT than GCSEs.
So basically, there's no reason in principle you couldn't apply to Oxford, Cambridge, or medicine. However I would note for medicine at Oxford specifically you are probably not competitive on the basis of GCSEs because they are very GCSE heavy as a medical school.
Of course for medicine it doesn't actually matter which medical school you go to, as the GMC accredits them all equally and considers them equivalent, and the NHS (which is the only provider of graduate medical training posts) doesn't even look at your medical school and in fact blinds recruiters from that information to ensure no bias.

Depends on which medicine course and which course at Oxford or Cambridge. They all assess GCSEs differently.
Your GCSEs are very good in context, and also not all medical schools even score GCSEs (e.g. Imperial, UCL, and others just require minimum grades in English language and/or maths, and otherwise don't look at your GCSEs).
Oxford and Cambridge weight GCSEs differently on the whole, with Oxford tending to put slightly more emphasis on them, but this also varies considerably between courses - for example maths at Oxford tends to put more emphasis on the MAT than GCSEs.
So basically, there's no reason in principle you couldn't apply to Oxford, Cambridge, or medicine. However I would note for medicine at Oxford specifically you are probably not competitive on the basis of GCSEs because they are very GCSE heavy as a medical school.
Of course for medicine it doesn't actually matter which medical school you go to, as the GMC accredits them all equally and considers them equivalent, and the NHS (which is the only provider of graduate medical training posts) doesn't even look at your medical school and in fact blinds recruiters from that information to ensure no bias.

sorry if this irrelevant to the post, i already 4 gcses resits from 6s to 8/9s and overall mainly 8-9s except a 5 and a 4 in cs and french but now i kinda regret coz not say my og gcses were amazing but there is people with poorer gcses than me got into med school, and i have come to thought that me choose to resits just puts me at a disadvantage. pls do suggest any advice i could take tyy!

I mean you've already done the resits so I don't think there's anything to do now specifically?
Just apply to medical schools that don't have an issue with GCSE resits (I imagine most that don't score GCSEs e.g. Imperial etc).