You aren't a magnet but a magnifier. I'm like that. You need to understand that. What is around is always around with or without you. You are a catalyst. And that can make bad situations worse with you in the equation if you don't learn how to manage it. At the same time it will make your own magick practice much more fulfilling with many beautiful experiences should you do the work to build your knowledge to the point where you can handle and provent the potential dangers of manifestation.
It's very important to be a positive person, control your thoughts (don't dwell on negative ones), and create your atmosphere by controlling yourself internally and externally. Your home should be your kingdom and should be 100% protected and a safe haven magickally/spiritually.
You will only magnify what you reflect and focus on. But regardless you should avoid situations that put you into a bad atmosphere. When you are forced to be in hospitals, funeral homes, cemeteries, and hot spots for spiritual activity, be sure that you are extremely grounded and protected with physical objects (amulets, wards, bags, etc. whatever your style). I recommend the combination of hematite and black tourmaline. The addition of citrine if you are in a negative mood. They should all be cleansed/blessed and charged accordingly. If you don't know how to do this, I can talk to you in PM. Just pop them all into a little pouch, maybe add a bit of herbs if you like, such as a sprig of rosemary and a bay leaf.
If you prefer symbolism/sigils, I can't say I've ever had much luck with them assisting. The stones' spirit/energy can help to train you to be able to do what they do without them, in time, if you meditate with them regularly.