Sex and pregnancy

So since we got pregnant we have had sex only 2 times... I'm 12 weeks along now... And when I try to bring it up he comes up with some excuse like he's to tired or full or whatever! He thinks it's ok cause he is pleasured(masturbates) but he knows that that's not really my thing and I don't have any toys or what not to pleasure myself with. I brought up the fact that it's selfish to do that and not think about me and my needs!! I said I was gonna go buy a toy and he doesn't want me to! He tells me it's all my fault because I don't do anything sexy and I'm always sick! How am I suppose to be sexy when I am so exhausted and sick all the time!!! I just don't know what to do here!!! Help!!!