Actually, progress
should stop in your case because:
(a) Your form on Squats and Deadlifts was really bad
(b) You aren't doing mobility drills until recently
(c) Your programming is shitty because starting strength sucks balls
If you want to learn how to lift properly, you really should look at this article written by Eric Troy:
The Honeymoon Period
Then, start doing the hip mobility drills. Pick 10 exercises out of the entire bunch (you can find a HUGE selection of exercises right here:
Mobility Drills) and do then each and every workout.
Next, stop doing this fucking Starting Strength and do what the honeymoon period instructs you to do.
Follow a template.
Workout 1: Lower Body
Deadlifts
Front Squats
Lunges or Pullthroughs
Core Exercise
Workout 2: Upper Body
Military Press
Pull-ups
Unilateral Bench Press
Core Exercise
Workout 3: Full Body
Overhead Squat learning
Back Squats
Bench Press
Some Row variation (I'd prefer you do Dumbbell Rows)
Core Exercise
This is it. You follow this template, and you follow the guidelines in that article by Eric talking about progression and I am pretty sure that you'll be fine.