How do I Know that Im Pregnant without Taking a Test?

I had unprotected sex during my period which I thought that would never get me pregnant… then I read that stuff about how a woman is more furtal when shes having her period… then I got paranoid because I dont wanna be pregnant and I never wanna have freakin kids… im in good health, I mean I never got sick or broke any bones had any diseases, dont feel pain when I get hurt or get cut or whatever, and when I get the flu it stays there for 2 days and I dont feel that bad, you know im kinda healthy and stuff so I guess thats why I dont have morning sickness or puke at all.. although sometimes I throw up just after having one beer which is not normal 4 me… I lost my appetite…crave for junk food.. get thirsty a lot… I pee a lot… I have “u know that thing” “the opposite of diarrhea” I sleep a lot these days, I get angry at anything and lose my temper easily, I feel like I wanna be alone kinda depressed, my stomach feels funny sometimes when I talk and stuff, sometimes I get this pain in my stomach like what you call “butterflies”.. I lost the feeling that I can get attracted to anyone or get turned on… can I still produce eggs or whatever even if I smoke like 3 packs of ciggaretts a day for more than 6 years and also drink a lot… I guess just by doing that I will never get pregnant even if I tried… so am I pregnant… could I possibly be pregnant… or am I just paranoid and freaking out? maybe I have a sexual disease 4m having sex on my period??… btw I dont know whens my next period, I dont mark it on the stupid calender.. yeah and just to make things clear.. im in a serious relationship to be engaged.. so yes I have a boyfriend.. and no im not a slut because I know I sounded kinda trashy in that message but I just say whatever I feel like that doesnt make me a slut… so someone plzzz answer me… someone answer me please…