The goal of practice is not to remove feelings (vedana), even strong ones. So even people with advanced practice may feel strong emotions. Rather than regard these as an indication of doubt about the efficacy of practice (see: Hindrance #5), recognize them as grist for the mill. In the process of applying mindfulness, equanimity, compassion, etc. to these experiences, they actually develop
These experiences are not indication of failure or obstacles to practice. They are the very stepping stones through which practice progresses. Welcome them as teachers. Pema Chodron said, "Nothing goes away until it has taught us what we needed to know." I find that perspective very helpful. Otherwise, thinking you "shouldn't" have felt so intensely or that your practice "should" have been better is just clinging in disguise.