I am 8 months into pcs, and although things are slowly improving I still have that knot in my tummy feeling, (anxiety ?)

which I have had since last June when I hit my head.
It comes and goes I used to get it when I was tired or worried but now when I get it it seems to hang around for days I sometimes get pains in my tummy (bit like ibs pains). I wonder if anyone else gets this ? .
Also since my injury my tummy seems to be different, it's difficult to describe, but I donot eat as much as I used to as my taste buds have changed.
I was wondering if after all this time my poor old tummy is just tied up in knots ?? any advice would be welcome...
Many Thanks..Hope you all good today
Cx