I have two pending misdemeanor charges currently pending. My question is how are they going to affect my future? What are possible outcomes?

I am 21 years old and have never been in trouble before with the law. I have been going to college for 3 years and I started right after high school. One of my charges is for DWI and another is for possession of marijuana for less than 2 ounces. One occurred on New Years of this year and another occurred just recently. Both were classified as Class B misdemeanors. On the DWI charge, I was stopped for speeding and blew a .16 and the other I was riding with a couple friends, completely sober, and my friend got pulled over for running a red light. They smell marijuana on my friend in the back, due to him smoking before we left the house, but they arrest me for having it in my possession.