Feeling so irritable

I feel like my anger is sometimes getting the best of me and I want to keep it check before I yell or get too rough with anything. I sometimes feel like breaking something or throwing something when I’m really angry. Little things seem to be making me feel irritated lately and I can feel it adding up.
For example, the coffee didn’t make correctly, which was frustrating, then my son kept putting the dog’s food in the dog’s water dish after I asked him to stop. I picked him up swiftly and sternly told him to stop, which I don’t normally do. Then I looked at the situation and thought I was being harsh and I had anger up the surface.
I had a therapist for a few years up until the 1st of this month when my insurance changed. I think this is part of the reason, but I am open to suggestions.