I have so much slime in my throat (especially in the mornings.) i've had this problem for a while now. i have reflux, is that the reason?

Could be: If you are overweight, it is imperative that you lose weight. Increased intraabdominal pressure from belly fat may be causing acid reflux and mouth breathing. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Get HPV and Covid vaccines.