zoezoeiou, don't feel so stressful about getting pregnant because it will make your body too tense. You didn't do anything wrong so forget about what your mother-in-law said to you or did to you. It is more important to stay happy and focus on getting healthy so that you can start trying again!
I miscarried once and I also went to see a Chinese doctor. He told me that nothing is better than having a happy and positive mind. If we feel sad, stressful, or depressed, even we take a lot of medicine it still won't do us any good. When we have a healthy mind, our body will react in a healthy way.
You are not old at all. My mom has my brother when she was 40! Take it easy. Maybe you can go on travelling with your husband later on. When both of you are happy and relaxed, chances to get pregnant will be better ga!