Is it possible to get pregnant having two periods in one month for the first time?

Yes! You can! I had my three kids! Each of them every time after I have two periods with in one month. So I find out that I am most fertile the next month after that so I usually try having kids after my 2nd period! Worked for me 3 times already. I don't know how but it works for me! Haven't met anyone that has kids after having two periods in one month!