Also UKC is generally seen as v dodgy on Mumsnet
UK column has been widely discredited by the scientific & medical community due to the vaccine disinformation they push, and the people they promote on their website who have used the pandemic to profit from disinformation @AreYouVeryAnti
Worsening of IC occurs at a background rate in the general population - before 2020 a certain number of people each year would report these symptoms. Given that almost everyone is vaccinated in the UK, nearly everyone who now reports worsening of symptoms will be vaccinated.
As has been previously posted, vaccine post-authorisation safety has been widely scrutinised and continues to be - and due to the sheer number of doses given this allows statistical power to detect even very rare effects. A number of side effects have now been established to be causal. Currently there is no evidence to suggest IC, or worsening of IC is one of them.
@Clairerk If it were me I'd focus energies on getting symptoms assessed and treated by a specialist, rather than attributing them to a vaccine that is unlikely to have contributed.
I also have IC, which has got worse over the last year, and found pelvic floor physio very helpful 