I’m just confused

I just want everybody’s opinion My boyfriend was very disappointed when I told him I wasn’t pregnant but I just found out my big sister is pregnant and when I told him he was so dry and let it slip that he lost two kids already and it’s disappointing to know that I’m not pregnant but when I questioned him further he got mad and evaded the question because he lied to me in the past and said that his ex had never been pregnant I just want to know if I have the right to be upset because he kept the fact that she got pregnant twice in the midst of him cheating on me with her.