Bad idea? Good idea?

Okay so me and my boyfriend bow fiancée have been TTC since January . We had a chemical in February . And are back to trying again . Well March 10th he proposed to me. I said says and our weeding will be in August of 2020 . I still want a baby and so does he . It will be our second . Do y’all think it’s a bad idea for me to ttc? I feel like if I’m not pregnant by May then I guess we will stop so I can fit into my dress and not be pregnant at my wedding ? I just was wanting people’s thoughts or ideas ?