Cousin is being a b*** over pregnancy

So my cousin has 3 kids 1 she is currently pregnant with. Me and my husband have been trying to have our baby # 1 for 3 years now. Whenever anyone tells me about their pregnancy I swallow the hurt and congratulate them. Well my cousin sent a pic of her positive test and even though it hurt I was still excited for her. 3 to 3 months later she texts me stuff that is kind of odd and hurtful like pics of her ultrasounds saying that it's a happiness (that I wish I could feel) she also says stuff like (I guess your never going to have kids?) And (your mom must be sad that she'll probably never be a grandmother) this is really hurting my feelings and I'm about to say something to her. Could I be over reacting?