abuse?

Hey this may be a little off topic but my friend is 36 weeks pregnant she said she asked her boyfriend to stop touching her and he went to kiss her as she was getting up and they banged heads she said to him if he would off listened it wouldn't off happened and she shouldn't moan cause his in more pain and then used the pillow and hit her round her head twice really hard she rang me crying saying she feels dizzy and has a headache I'm trying to get her too see that even if she doesn't have bruises this is abuse but she doesn't believe how can I help her