I can only add to the advice given is more of the same, hold the Str8 just enough for control and not with any type of 'FIRM" Grip. also when shaveing don't try so much to shave off the wiskers but just to wipe off the shaving cream. Let the blade do the work, not you. Don't try for an absolute BBS shave, just do some reduction maybe 2 pass's on the easy parts of the face and leave it at that, don't put any pressure on yourself, lots of face prep in a big help also. Aside from that maybe also just take some time off, 3 or 4 day's, use the DE for awhile and then take a deep breath and apply what I and the others have suggested.
Take your time, enjoy the ride, no worries!!

Most Sincerely, tinkersd