You seem to have married at very young age, as you are only 19 years old. Your husband talking privately must be bothering you and giving you insecured feeling.  Looks like you both are not communicating enough, also lack of understanding might be an issue.  Spend more quality time with your spouse, being jovial,  regular outing and anything that keep him more engaged with you. Avoid nagging or making him feel uncomfortable. I would suggest that you express your feelings to your spouse. Consult a Family Counsellor who can empower you to handle your issues. It would be great if both of you can go for counselling.

I can understand your situation. Seems like you are having anxiety and a few depressive symptoms. I would be more than happy to help you come out of it. Some counselling and if needed medical help might be useful for you.