Keeps switching back to safe mode and won't read SD Card
I had a customer with that and the developer options was on. I assumed that was it.
Try inserting your SD card to a computer or to other device to check if it is still working. With regards to safe mode issue, try removing the battery for a few minutes then try turning the phone again. Did you install any app before that started happening? If you did, uninstall it. It may be causing problem with the phone.