I'm a t1 and I've recently had some problems with hypos in the night and high sugars during the day. They've got better in the last week but I was really sick yesterday morning after being hypo during the night. I assumed it was something I ate and I felt better after but I'm feeling really sick again this morning after a night of extremely high sugars. I haven't thrown up and I've managed to eat breakfast but I still feel horrible. I have a little bit of a cough and wonder if it's that but I'm really worried. Please help!
Unfortunately nausea is a symptom that is common to both high and low BG.
Until you get your sugars stable, it's unlikely to go away.
As
@Daibell has said, it's important to get your basal set correctly. You can use this guide to help you do that:
https://mysugr.com/basal-rate-testing/
Once you get your basal dose right, then you can fine tune your I:C (insulin to carb ratio) in order to ensure you're injecting the correct amount of bolus insulin to cover your meals.
Try and make sure you have your last meal at least 5 hours before bed. This will ensure that the bolus insulin you last injected will have been used up completely before you go to sleep. Meaning that your BG should be more stable before you nod off. Also, if you're going to hypo from your last bolus - you'll be able to treat it when still awake.