I've felt this disgust, too. But for a different reason but I think I'm seeing a correlation. I got Post-partum Depression and PTSD after labor with my daughter and it took months to heal physically and years and years to heal mentally. I'm still not fully healed. Not even close. I think your going through similar notions and I don't think it will go away as quickly as it came.
Your health and well-being comes first. Sex is only enjoyable when both people are mentally and emotionally ready. It may disrupt your relationship, but I think you should talk to your boyfriend about this before he comes home so he's not thrown off guard and thinks something else is up. I there's anything more important in a relationship it's openness and honesty.
With all things considered, the Paris attack, the fight I think you have a good cause to feel the way you do. Some counselling may be a good idea.
I actually, was afraid to be at work the other day. I was enraged that we don't have proper security measures and I was analyzing everyone I saw. I can't believe my PM wants to rush in refugees. Sorry. Not trying to hijack your thread. But, yes, that incident put many people on edge and I think it's normal that it's affecting your personal life negatively.