السلام عليكم I occasionally have constipation that can last for the entire time period of a fard salah (mainly the shorter ones like Maghrib). Should I attempt to perform the salah on time even if I still haven't fully relieved myself yet? Or should I try to come back later even I miss the salah?

Ustadh AbdulAziz al-Haqqan

You can relieve yourself even if you were late for the congregation, but if you suffer from waswas, then you should be looking for medical help not asking this.