I'm a new guy and still learning, so take my words with a grain of salt. But you might try a back-flush even if the pressure may not show excessive yet. A. It's fairly harmless to do so. B. Your pressure gauge could be faulty, C. there could be algae in the filter delaying your recovery. May sound stupid, but I say this because I went through a couple blooms and found that, when backwashing during bloom treatment, the sightglass showed the water as quite green even when the pool was simply cloudy. Flushing it out seemed to help the pool recover faster? What do I know, just one man's observation... All the best to you!!