Me and my pregnant girlfriend did anal and she is crying every time we do it, can somebody help?

Are you taking your time? Are you using plenty of lube? Are you pressuring her into doing it but she wasn't that keen to do it? (ie she is not mentally relaxed to do it and get in the mood

Not all women enjoy anal sex. Obviously, if your lady is crying during anal sex, then something's wrong. Either she's not enjoying it, or its hurting her, if this is the case, she may be too shy to tell you so. Be sure to use plenty of lubricant....there's all kinds readily available.....and no I'm not talking about spit! 

Talk with her and see how she's feeling about it, if she's reluctant to tell you, just be supportive. Also, unless otherwise stated by her doctor, vaginal sex while pregnant is ok.

I'm a little surprised that when the mother of your unborn child starts to cry during sex you decide to ask total strangers what the problem could be rather than talking to her.

It sounds to me as though it is either painful for her or she doesn't like it, (or both). Maybe she is doing it just to please you.  However, surely after the first time she cried while doing it, you wouldn't consider trying it again?

My advice would be to pamper your girlfriend, buy her a nice gift, take her out to dinner, show her how special she is to you. Then later sit down with her and ask what it is about anal that she doesn't like. Be there for her, let her explain and encourage her to be open and honest with you.

There is no point in doing something sexual that either partner does not enjoy. It is supposed to be pleasurable to both. Crying during sex is only ever okay if they are tears of ecstasy because of the deep love connection you are sharing - in this case I don't think this is the cause.