What event are you training for? The half or the 5k? My suggestions apply primarily to the 5k. I think you are training too hard on Tues and Thursday. These should be easy recovery days. Cut mileage by half and run slower these days. You aren't recovering enough to put in a hard interval workout the next day. For example,
Reduce Tue to 3-4 miles at 9:30 pace with some strides.
Wed: Progressive ladder. 3 sets of 200 400 800. 1st set approx 45 sec, 95 sec, 3:30. 2nd set just a little faster, 3rd set, use the 200 and 400 to dial in pace for the 800... so run 48sec, 96, 3:12
Reduce Thurs 3 miles at 9:30 pace with some strides
Fri: 4 mile tempo progressive (start slower than 8min/mile, run last mile at 7:30 pace or what feels like just below a race level effort effort)
Another workout for Wed would be 3 sets of 3x400. Recovery 2min. Walk/jog a lap between sets. Run each set progressively faster. For example 94 95 94. Then 90 91 89. Then 90 87 84 or 90 84 87 for the last set. Sometimes I run hard on the next to last rep to ensure I'm tired for the last rep.
Another workout for Thursday would be 5x1000m in 4:20-ish (7min/mile pace) with the last rep harder at 4:10 or so
These aren't necessarily the best workouts, but they will train you to hurt. Some runners who took up running as adults haven't learned how to override the pain of running fast. It is a much different pain than enduring a half marathon.
Also, check your iron levels. It's a range. Runners need to be in the middle of the range or higher. If you're near the low end of the normal range, doctors will tell you that's it's okay, but coaches have reported their women runners with low normal iron levels ran better when they supplemented into the upper level of the range. Caution: Iron can be toxic so you don't want to overdo this. Ask your doctor.