Blu Studio XL2 wireless connection problems

It only started recently maybe because I put in an SD card and formatted it as internal, but I've been having connection problems with both any wifi and my bluetooth headphones. Sometimes it will let me connect to both for a small while and I have no clue what is different during those times, but once I open an app that requires internet my connection will buffer even with full bars and then drop the wifi connection. Or if I connect bluetooth headphones later on wifi will drop and bluetooth only seems to last a couple of minutes. I've also been getting authentication problems on networks I've been using for years. Last night it wouldn't even let me get into any type of wifi setting for a while and my phone would freeze and it would tell me that the system-UI has glitched and won't respond :/ restarting won't help

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