Great question — answering as the UphillTech team:
Mia, I don't mean to panic you, but you really should get an electrician to inspect your wiring as soon as you can. If it's something minor, you've taken a sensible precaution and gotten a problem fixed. If it's something major, you may save you and your daughter's lives. There's a possibility that it's something serious enough to start a fire. It sounds like you may have loose connections in your service panel (breaker box) or even loose or broken connections somewhere else, like in an outlet box or inside a wall. There's a chance it is a single bad connection. If the neutral connection in your service panel is loose or open, you could get wildly fluctuating voltage on your branch...
Full answer by Craig Tullis: https://diy.stackexchange.com/a/108330 (CC BY-SA 3.0).
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