boyf problems

Jessica
If any of you see/ read this, here's my problem. 
My boyfriend would always leave his phone in our room while he showered. One day he got mad at me for taking my phone in the bathroom with me while I showered so I started leaving it in the bedroom also. 
But just recently he's been taking his phone with him EVERYWHERE (including the bathroom). We've been fighting off and on for the pst two weeks, I feel like he's possibly hiding something. 
Am I wrong to feel like this is suspicious or am I totally overreacting about it.