I can understand your fear with having small children but the reality is the stress you are putting on yourself over this may actually be making the situation worse. From everything I have read vt in a health heart especially if it is short lived as yours is and converts on its own is not likely to cause you to fall into a more dangerous rhythm. That is generally reserved for people who have actual heart disease. I think your best bet is to try and get on top of your stress and anxiety. It will help you tremendously. I might also suggest, if you are unable to feel comfortable otherwise, maybe subscribing to one of those Life Alert type services where you were an alert beeper on your body and press if it an emergency happens. This may give you enough peace of mind to relax and trust that your heart will be fine and maybe sometime down the road if all remains fine you can end the service. But the bottom line is you are going to have to find some way to cope for the sake of your children. Talk to your doctor and have him explain your situation. Talk to a therapist to learn ways to deal with stress and simply try to stop and take deep breaths any time you feel something odd so you don't add to what is already going on by stressing out. I might also suggest trying to slow yourself physically down. Try to breath and take the stairs a bit slower and see if that helps alleviate the pvcs jumping in when you climb stairs. Essentially try to find ways you yourself can take control a bit rather than letting what is happening take control of you. Hang in there and Stay Strong. You will get through this if not for you but simply because you love those children so much. Sending health your way. Take care.
I'm sure I'm not the first who wants to help, my thoughts and prayers are with you.
How high is your heart rate when you experience VT? At your young age I will guess a HR of 200 isn't likely to damage you and unless your doctor says otherwise you get emotionally overwrought - this may be a stimulus of the high heart rate.
Perhaps you should discuss with your doctor trying some medication to lower your anxiety. I too hate to take more medication, but if it helps then it seems the right thing to do. Maybe such an approach will help you gain control and then move to managing anxiety (if you have some, and it reads like you surely have reasons to) without medication.
Good luck, hope you get some help from others - we do care.