Your body will change and basals will need to be adjusted. It is scary. I had some recent problems similar to yours. I had two posts. Got some fantastic advice. You will need to cut and paste these, as I am not really sure how to add the link correctly.)
https://forum.tudiabetes.org/topics/basal-change
https://forum.tudiabetes.org/topics/on-vacation-help-please
I ended up resetting all my basals, based on the article Kelly linked in the first link above. It has worked quite well.
http://www.diatribe.us/issues/26/thinking-like-a-pancreas.php