Not sure what a normal range for spo2 are as I just had my oxygen levels checked and it's 94spo2, it was 98/99 few days ago, also had to change to a long lasting steroid inhaler for asthma?

Can vary. It can vary but it s still in the 90s. If you are having shortness of breath or wheezing the number would be lower also cold fingers can cause a change in the meters ability to detect accurately.