TL MaN 05 WdP

i had a problem i think i dont know if it was due to a drop call ? i will explain.
i was using my blue tooth phone sony ericson t610 call was going good then all of a sudden the screen went dead for a sec phone was cut off then phone flash in use and i dont think it was because i didnt hear anything was wondering if anyone had the same problem and maybe i got worry from a drop call im new to this blue tooth thing but i use the phone before and it work normal and i use it after and was working just wondering if it was glitch in the system or a computer problem i really hate to bring it in the shop for this if it keeps it up im gonna have too please give me feed back on this thanks