19 Weeks...

So Im 19 weeks tomorrow and today has been a hell of a day.. from arguements with family members breaking down into tears feeling like i have been nothing but sad and i feel i can enjoy my pregnancy like i want to with so much stress and sadness lately.... im having slight pains in my lower abdomen nothing strong but im just concerned it might be from this horrid day... can anyone tell me if this has happened before to them where they just feel completely sad during their pregnancy... i love my baby and my baby was planned so i feel even more sad that I cant enjoy this moment like i imagined i was going to. I feel like i am part to blame because I have been getting upset over little things and than I end up crying... like why? Why cant i just feel happy..... i want to enjoy my pregnancy 😔