That sounds really exhausting, especially when you were probably hoping the nausea would ease up by now. Some mums do find it persists longer than expected, and the post nasal drip making it worse is a real thing too. It might be worth mentioning it to your gynae or PD at your next visit, just so they can check if there is anything they can do to help you manage it better. You are already doing your best, and that counts for a lot.