He's probably okay. I had a betta that hid as soon as I put him in his bowl after coming home. Just watch out for anything that may be a symptom of a disease and keep an eye on your water parameters and temperature.
I've never kept female bettas, but I hear that you shouldn't leave them together for too long without a divider.
Despair is for people who know beyond any doubt what the future is going to be… In that case, there is always hope. ~Dr. Patrick Curry
Ophelia (Petunia), white with specks of violet on fins F
Merlin, navy with orange fins tipped in navy VT M
Gareth, orange dalmatian VT M
Lancelot, blue/ green VT M (RIP)