Lost of Motivation

When I got called to the counselor's office I thought I did something bad such as being tardy to 0 period a couple of times but unfortunately I wasn't. I was called upon one of my grades. I looked at it sort of not suprised but I saw all my grades for the first quarter. I was shocked really and also expecting it, hard to explain. I knew I wouldn't do so well in the first quarter but not this bad. For the rest of the day I felt completely crappy and of course I was going to tell my parents about my grades rather then having them finding out later. Usually if I tell my parents that "Oh I'll do better next report card," it usually gets by without a lecture. Completley different story when I got home. My dad and mom didn't take it so well and they really went down hard on me. It made my mood even worse that day.
I've never done so bad in school, but it wasn't as bad like last year. I still have a 3 but to go to university I need a higher G.P.A. I remember in freshman year I was playing two sports, football and basketball, and I maintained a 3.5 or higher. I've realized that I work harder when I want something, bad grades means no sports and no sports means no fun for me. I liked playing football and basketball because they were great way to stay in shape and having fun. This year I'm not playing football or basketball, but I am playing rugby in the second sememster.
I lost what was motivating me and so now I have to work twice as hard to get my grades back up and maintaining them. I went by school last year with the thought of "I'll do better next quarter or I 'll study next time," that thought screwed up my gpa. Once you start failing tests and don't do anything about it, you continue to fail. My parents didn't raise me with that mentality, and so I'm not just hurting myself but disappointing my parents. I have this complete change in me and so now I have to prove that I have changed to myself. Hopefully reaching my biggest goal of getting a 4.0 or higher. But to get to that goal I have to set minor goals and work my way up.