Philosophy complements your other choices for a psychology choice well; psychology originally grew out of the branch of "mental philosophy" and still has strong ties to the philosophy of mind and language. While the field on the whole currently continues to shift towards a more biological focus, having some background in philosophy will help contextualise this shift.
Photography or textiles are perfectly acceptable as a 4th A-level; I wouldn't recommend taking them both. Creative subjects tend to be more work than they appear to be on the surface however, so be sure to factor that in. Maths or chemistry would also be strong options as a fourth subject with psychology, philosophy, and biology with the latter significantly broadening your application choices and being a good basis if your interests run in the neurobiology direction. Alternately english language is a slightly more pedestrian option that is very relevant to further study in psychology, as linguistics is closely tied to the field of psychology (and as noted, philosophy).
As frequently noted on here, foreign languages tend to be a lot of work, and quite challenging in exams. If you aren't sure, that's generally a sign to opt for something else.