Yeah, probably. I’m a 7-7.5 in regular shoes, and I’m wearing a 7.5 in my (beloved!) Brooks Defyance 5s. Should probably be an 8, but I didn’t have trouble until I hit distances >12 miles. Might try to size up next time. For now: rocking the seven I have left!
Why are you constantly having toenail issues?! Are your shoes too small? P.S. pretty sure I’d be too chicken too.