My Moms very upset. Any advice?

I love my mom to death, seeing her upset kills me. I ship out in August and I believe reality is finally setting in for her. When I got home from MEPs last Tuesday I told my family in the living room that I swore in and I’ll be shipping out August 25th. Everyone congratulated me and after my mom congratulated me she broke down into tears. Never have I seen her worried about me joining the Military. She was very supportive of it when I first brung up l wanted to join last year February. As we got closer to me graduating high school I think reality is really setting in for her and her anxiety seems extremely high. My mom likes to make jokes out of things to cope with stuff that upsets her. She makes a lot of jokes and refers to me every now and then as “Infantry boy” “Ma-retard”, I can see it’s really on her mind.

Anyone else went through this? How can I help my Mama?