Could I be ovulating?

Sarah 💙💙 mummy to 2 boys 🥰

So Thursday 28/06 I had an ultrasound that showed no dominant follicles and a thin lining but today my boobs and in particular my nipples have been really sore and I have had lots of nausea. I know I can’t be pregnant as the scan showed I hadn’t ovulated but could I be ovulating now? Please help xx