I keep foam rolling ...
I stretched for 30 minutes every day ...
I've been icing...
I've taken 2 weeks completely off ... and it still hurts.
Below describes why taking time off and passive treatments won't get you back to the starting line.
TISSUE CAPACITY DEFINED:
The ability of your tissues (muscle, tendon, ligament, bone) to handle the stresses placed on them. Simply: are you strong enough or not? If your capacity (think strength) exceeds the stress (training workload: running, lifting, throwing, etc), you're in good shape and injury is less likely to occur. If the training stress is greater than your tissue capacity, you're at higher risk for injury(1). With that imbalance of stress>capacity, injury can arise from a large spike in stress (example: running a marathon with zero training) or more gradually (bony stress injury, tendinopathy, and more). Both scenarios account for the majority of running injuries, and almost always, the answer is to get stronger.
The problem with resting is that by taking time off, the tissue will become weaker. There is a detraining effect. It takes 6 weeks to build muscle, but only 10 days to lose that fitness(2). By taking 1 week, 2 weeks off, you're often in a weakened and more vulnerable state than before (the tissue capacity has decreased). The symptoms may have decreased for now, but your return to sport is likely to be riddled with a cycle of injury, rest, injury, rest. Foam roll all you want, the tissue still isn't ready to handle the training loads.
Some injuries, some of the time, require a period of "relative rest." The goal of relative rest is to decrease the load into the injured tissue while maintaining as high level of fitness as possible. This could be in the form of cross training, a run:walk program, shoe-wear/gait change, or some other modification. Almost always, the answer is to modify, not completely stop, running.
During that period of relative rest, a strength program should be managed to progressively build up tissue capacity to adequately meet the demands of running.
Foam rolling, icing, and stretching are useful adjuncts and certainly have their place. The problem is when these adjuncts take the valuable time needed for strengthening and building tissue capacity. When time is limited (when is it not?), opt to get strong.