Uhmm...

So I'm just a little worried my period is 6 days late according to eve... But I've never had penis in vagina sex only anal... So I know pregnancy is rare almost non-existent... But I've been getting stomach pains and I have to urinate more frequently than other times... I have back cramps but I do have back problems... So any help or advise would be greatly helpful... My So and I are planning on having penis in vagina sex on the 31ste is it wise.. We will be using condoms

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(no mean comments please Im just a bit confused)