i conversations are disappearing allot lately. sometimes i get a text then i go check it it says no conversations.

i still get alerts, my blue notification light flashes also.
i cant afford for this to be happening. i run a business and im missing money.

can anyone solve this or is having this same issue?
Also my call log is doing the same every now and then.
these issues have been happening for about a week now.
i have rebooted my phone over and over again

please help