Hi Kerry
Sending a welcome hug
I moved your post so you have your own thread. You'll soon get used to finding your way around, just let us know if you're stuck at all
After losing my dad I went through a stage of anger and very short patience, I would react in ways I didnt recognise as myself. Often getting quite angry and irritable at work. Thankfully my boss was very understanding and he would let me rant if I needed. It did pass and I felt more like me again.
All I can say is be gentle with yourself, try some relaxation techniques and it will get easier in time. You may find it helps talking with us here, we're here whatever you need to talk about, even if you need to rant xx