Sounds a bit like a problem I had last year….
Started like that with the toe, then got worse untill I couldnt lift my right foot- like bend it up- but could bend it down OK. No pain , swelling etc., but I ended up walking awkwardly, kept stybbing toes etc.
Went to see Dr.-"dropped foot" he says, move your foot, and go swimming.
Didnt go swimming, and it sort of went away itself, after 6 weeks or so.
Good luck!