Sayang, I haven't personally gone through hyperthyroid pregnancy myself, tapi a few of my mum friends who had thyroid issues during pregnancy did need closer monitoring with their doctors, actually kena follow up more frequent. Since yours is hyperthyroid and due end August, I'd really encourage you to check in with your OB about this one, because thyroid levels during pregnancy can affect baby and labour timing, so better to get their professional guidance on whether there's any risk of early delivery in your case. Hope everything goes smoothly for you!