I Have Been Doing Poppers Very Heavy For The Past

I have been doing poppers very heavy for the past 7 months , but have been smoking them for 3 years. Over this increase I've noticed long periods of time were I am unable to eat, feel very sick to my stomach, pain throughout my whole body off and on & extreme headaches, are these things caused from the poppers? I haven't had my period right since I started smoking poppers, it comes about every 4-7 months but sometimes lasts 2-4weeks at a time is this from the poppers? Also been burping up smoke, & occasionally think I'm popping but actually it being smoke, I'm unable to eat right due to constant throwing up. What am I doing to my stomach?