What Causes Stomach Pain And Nausea While On Birth Control Pills?

Hi, may I answer your health queries right now ? Please type your query here... Hi, before I started my new birth control my period was 2-3 days with a very light period. I've been having sharp pains and sometimes Just a sore stomach. Sometimes I feel like gagging, but no throw up. I'm still taking my birth control, but I accidently skipped a couple days. Also, my urine is dark yellow. Are you able to tell me what's wrong with me?