Missing Period

So i know some people dont want to hear about my period problems lol but i find this is the safest place to write it. I am married, have sexual intercourse with my husband... he doesnt wear a condom but he pulls out but we both know its not the for sure way to not get pregnant. we figure if we have another baby, we're married and we can have another one if im pregnant then we'll be happy about it but we plan on waiting on trying anyways. Well I usually have been getting my period on the 8th day of each month. But today is the 13th day and noooo period. for the last 2 1/2 weeks, i've been getting nauseated and a little hungrier.... maybe a few cramps on my abdomen..but other than that, nothing. my husband told me lets just scedule an appointment with my o/b. and if your not pregnant, then we can get you on some kind of pill to keep you regulated. When I found out i was pregnant with my daughter, pregnancy tests never showed up for me, i went to the doctors bc i was missing my period, found out i had displasia.... they made sure i wasnt pregnant b4 they took tissue and they came in and said they couldnt take the tissue bc i was pregnant. that was definitly a shock. after i had jae they re-examined me so if the displasia was still there, they could fix it or whatever they had to do. it was almost gone so they still have to keep an eye on it.... but i dont know, i've wanted to just get a pregnancy test in case they work this time but my hormones i guess dont pick up on the tests if i am pregnant..... Im kinda nervous if i am pregnant bc it feels like my marriage isnt going too well right now... then again i miss having my daughter that little bitty baby lol... i may just be missing my period due to stress... i've been really stresed about alot. My marriage, my life, schooling.... i want to start school but would rather be making money for my family... seems like we never have enough money for everything... we have money for what we need but a date would be nice... might make my marriage a little better... I feel aweful bc i feel like for the lonnnngest time, i tried to make our marriage work and try to do stuff to make things better but now i feel like not trying much anymore and he is trying a little more. now im just tired of trying.... i havent addmited much to him that i feel like things arent working... i feel unhappy. but i've always said i will try to make things work for my daughter. i know what it feels like to have a mom and dad but never together and i lived with my grandparents so i could never tell who i had at times. my mom and dad split when i was 3 months old so i dont know what its like to have parents together... but freinds that did have both, i would stay the night and it was such a happy enviroment... i have to work on alot. i need to work on myself making myself better and making things work with my husband. i do love him and he loves me... i've been with him for 12 years and i'm almost 21... its like i know everything about him as he does me and it gets boring, theres nothing much to talk about... i ask him things, he asks as if they are dumb questions. i dont know...... i feel sad.... i hate being sad all the time... its so funny how i wanted to write about my missed period but ended up talking about everything else as well...