Newly diagnosed

I have a question that I have not seen on any discussion,  Does anyone hae experience with emotional flare ups as well as physical flare ups?  I have only been diagnosed with RA for 6 months, am on MTX.  My pain is very well controlled, taking a NSAID only at bedtime, but a few times I have been so incredibly irritable I can't stand being around myself, I cannot determine any reason, and wonder if the RA can do this by itself.  I am trying to determine if there is any relation between these episodes and being due for my next MTX dose, but haven't found that yet.