Possibly Pregnant? *VENTING*

Well, the past week or so I've been feeling really weird...Every day I wake up sick feeling and if I don't wake up sick feeling i do a couple hours after I get up. My appetite has SKY ROCKED (keep in mind I'm already a big girl but I don't eat much at one time I just snack during the day) I haven't physically gotten sick but I just don't feel quite right. Reason why I'm so skeptical is because I'm on birth control..I have been on the pill for going on 3 years ..but lately I've slacked off and have forgotten to take my pills at the right time or I've doubled up. My fiancé and I really only rely on the birth control because we are stupid. I'm also 19 have my own house my own job(which I just recently got hired for YESTERDAY!) all my friends have babies except my 2 youngest friends ones still in high school and ones just started college. My Soon to be husband actually wants a baby but I'm scared...I've already dissipointed my mom enough by moving out at 17 and getting engaged at 17. Any time I go to say mom I have to tell you something she freaks out and like prays to me I hope you aren't pregnant cause I'd be so upset for you and she's really the only person I wanna talk to about this .. But I can't she's not understanding. I mean I wouldn't be so mad if I was pregnant but it wouldn't be good timing.. I'm literally just getting my life started. I'm getting married In March and always told myself I'd wait until after I got married to have kids. I just feel like I'd dissipoint everyone... I mean I know in the end it's my life but...I don't feel ready. I'm scared to take a test I keep telling myself I'll wait a little longer and if I actually get sick ill go take one first thing which is stupid because some people don't even get sick. But my period is supposed to start in about a week and a half.. So I guess we'll find out then. I really just need someone to talk to besides my fiancé. He helps but he doesn't understand.