Also, I don't mean to alarm you, but A-Level languages are a LOT harder than GCSE languages.
I, too, did French and Spanish GCSEs. Got an A* in French and an A in Spanish.
Massive shock to the system doing them both for A-Levels though. Ended up with Cs in both, and I had to resit French to get it up to a B.
Meanwhile I took GCSE Italian at the same time alongside A-Levels and got an A in it.
Studying 5 subjects, two of them being French and Spanish... I hate to say it but it's just not terribly realistic. It's also absolutely unnecessary.
Just do 3. Seriously, you do not need more.