Can we please remember that beliefs are a protected characteristic (at least in UK law) and be respectful - and this is in 'spirituality'.
So from a Woo point of view there are several things you could do to protect yourself. I'm more familiar with crystals and essences becasue I took the qualifications a few years ago, though I don't work with them, so my advice is skewed towards them.
The first I would suggest is getting a few pieces of hematite (cheap enough crystal) and cleanse them thoroughly - shove out in a rainstorm is my go to and is free, but natural spring water poured over slowly will do. You'll need to keep cleaning them if they're to keep working for you - maybe daily, but at least once a week. Also give them some sunlight to keep them charged for the work.
Hematite reflects negativity and is protective. I say a few pieces because I'd put 4 in the corners of your house to make this a protected zone too.
Other crystals you could add are Sodalite and Smoky quartz, again for protection and sodalite because it softens negative spoken words that are directed at you. Again they aren't expensive. Keep them on you - in a pocket or even in a bra (but don't go for a CT scan and forget they're in your bra like a friend of mine did - it wasn't a problem but made the radiographer laugh). Or get bracelets.
Some people have those blue beads that resemble eyes as protection over body or home. It's not one I've used but might be inexpensive and work for you (and again I'd cleanse anything I'm using).
Another thing I use is Bach Flower essences and I treat myself for the emotions in the person I'm dealing with, almost like an antidote, as well as how it's making me feel. So if someone else is resentful I'll take Willow, or for anger I'll take Holly. Then I'll take White Chestnut to clear my thoughts and Olive if it's making my physical energy low. If you don't want to buy an expensive kit just getting a bottle of rescue remedy would support you and they are readily available in supermarkets, Boots, healthfood shops etc. If you get the 'night' version it will have White Chestnut in as well.
You could of course go find a psychic/crystal healer/woo practitioner but that can be costly, so I'd try things at home. If you do go that route get local word-of-mouth recommendations. I've been to some who are fab, and others that were not so much.