I had a sought of similar reaction to buying my Hasselblad - even though I had thought it all through, searched and waited for *the right one* once I had bought it - <panic> what had I done, too much money, what was I thinking, could have got a blah blah blah instead......etc.
I think your reaction is typical of someone who (not knowing circumstances) may not have loads of money to burn/waste and perhaps seeks value for money.
Not knowing what you paid for the camera, difficult to say if you got a bargain - however, the 7II and lenses are legendary and was the only viable alternative for me to the Hass.
Try it, enjoy it and if it doesn't suit I would be confident you could get what you paid for it.