Loestrin 24 Fe Loestrin 24, Pregnancy Test, Lack of Sex, Morning Sickness, Fiance

I'm 23 and have been on Loestrin 24 for about a year and a half now. For the 1st month I was on it I was feeling really sick as if I was pregnant having morning sickness so I called my doctor and she said its takes about a month to get in your system so I should continue taking them, well after that month went by everything was great I got my periods on time every month they were longer than normal but I was fine with that, the pill even made my hair grow but about 2 months ago my period came but I was spotting for a day or two then last month I didn't have a period at all and I took a pregnancy test and of course it was negative but now i'm starting to get scared because since I started my period at the age 12 it has been normal and now all of a sudden it's gone and I know i'm to young to not have one at all, can anyone let me know if there going thru the same thing and what I should do. Oh yea I'm also experiencing the lack of sex drive my fiance thought I was cheating on him and was more interested in the other person (That doesn't even exists) LOL