[Q] Unable to use phone topic

Hi guys I have a 18 month old Micromax Canvas HD A116. I rooted it since 6 months and had no problem with flashing ROMs and all the other various processes you can do after rooting... but since 2 weeks i have had a recurring problem of crashes. i was using the same rom for 3 months and then one day suddenly messages start popping up rapidly 'Play Store has stopped working', 'Chrome has stopped working', then the entire phone crashes and 'unfortunately com.android.phone has stopped working'... i reboot & the same goes on repeating... i then unrooted & flashed my stock rom back in sptools and there was no problem for some hours and then the whole thing started again...gapps has stopped working, acore has stopped working, media has stopped working and then phone has stopped working. Its very frustrating and i just can't use my phone for any purpose. Can someone help me on this.. i made an account on xda just to ask this.. although i have noticed one difference.. before unrooting gapps did not crash as much as it did after unrooting... i tried signing out of google and then signing in again but did not help. what can i do now...