Am I Pregnat Im getting Some Symptoms?

Ok me and my boyfriend was planning on having a babby in march so since we caculated 9 months we both saggitarius the 9 th month would be december.Ok everything was all normal i got my peorid later that month nd we did it on da 11 or 12 so on the 31 i got ma peorid it was very light so likeahh week later my brests was pealing and i started getting bloated i mean i relly dnt know im getting cramps and constipation nd i used ta always suck in my stomach it hurts now wen i do it but i feel no lumps its goin on the idk week i mean am i or not i want to weight it out cause if i am its ment but if im not its not im stuck.HELP MEA