Should I Be Offended???

So my boyfriend is in the army and he was able to come to town for fourth of July weekend due to emergency leave and I was with him the entire weekend and we had sex ...and according to eve my period was suppose to happen 4 days ago but nothing has happened so I told him and he said that he wants a DNA test to make sure that if I am pregnant that the baby is his and he said of it is he will marry me and I will be able to come with him and live on base ....should I be offended that he wants a DNA test ...it kind of makes me feel like he kind of doesn't trust me