when you say that her chest is tight....do you mean pain or shortness of breath?
Has she been vomiting or had loose stool?
Is she tablet or insulin controlled diabetes?
Her chest is tight because she is getting over a cold
The sinus issue, will be linked to the cold. The nausea could be a side effect of the medication, although usually it is quite well tolerated.
She has vomited when she eats and has a loose stool
The important thing at the moment is fluid hydration and her low sugar.
Is she still passing good quantities of clear urine?
she takes insulen injections 4 per day
Being insulin dependent will change things as she will need more intensive support than you may be able to manage at home. Usually when unwell a person's glucose can increase due to stress response.
her urine is clear but not much because water will not stay down
If her urine output is down then she needs some fluid hydration and anti-emetics to help the vomiting.
her suger level is in the 120's
Sugar level of 120's is not too bad but her She will need to go to an urgent care clinic or ER for assessment and approp
appropriate management of dehydration which will mean a IV infusion
Because she is vomiting, oral antisickness tablets will be less effective and she will also need medication either IV or subcutaneous to help the vomiting