Form of Panic Attack?

So I've asked this question before and people seem to think that what I'm experiencing are panic attacks but I want to be completely sure. It's hard for me to tell because I don't ever remember feeling like I'm going to die and that's what a lot of people say when they describe them. I also don't feel like I'm having a heart attack, I just feel completely lost and out of control. The only symptoms I really get are crying, shaking, fast heart beat, intense and fast breathing, having to sit down, and feeling a little dizzy sometimes. I know that I'm definitely in no condition to talk to people, or even speak full words even. It usually lasts for about ten minutes at the most. But I never experience this just out of the blue, it only happens when something upsetting to me triggers it and depending on how stressed I am the more likely it is to happen. Also, people say there are ways to stop it, but for me if I do calm myself down before something happens then it will usually just happen later once I think about whatever it is upsetting me or stressing me out. Sometimes I freak out over the tiniest thing, and when I look back on it I don't know why i freaked out so much. When it happens I can't think anything through, I just feel extremely hopeless, like there is no way out and that I will never get through whatever is stressing me. So, would you say this is definitely a form of panic attack or am I just really upset?