This may sound strange, but I don't feel it's as simple as me being upset by this person, but this person's negativity actually 'infecting' me somehow.MY concern, after reading that, is that you picked up a hitchiker, so to speak, a discarnate entity or other energetic "thing" or parasite. You have nothing to lose by assuming this is a possibility and trying to treat for it. It's possible to send it/them on their merry way on your own, or there are people who can help you if you need it. This is a free will universe and you are supposed to be able to insist that they leave you and your energy field.
Sooooo, get quiet, surround yourself with White Light of Protection; call in the reinforcements (your guides and as many ascended masters/deities/etc. as you like) and command (in a very firm way) any energies NOT YOUR OWN to leave you immediately and forever. If you end up thinking you've got a discarnate entity, you can suggest they go to the Light. Visualize your Spirit helpers escorting the whatever, seeing it get smaller and smaller.
Now check out your own energy field. Plug any holes (fill with Light).
If it's not something not your own, you may find some help in addition to the above suggestions from others on this thread:
The DU Spiritual Emergency Tool Kit
http://www.democraticunderground.com/discuss/duboard.php?az=show_topic&forum=245&topic_id=4645Additionally, if you're prone to pick up on others' energies (and this is true to some extent or another for ALL Water Signs of the Zodiac and all empaths and sensitives in general), please, please, please avail yourself of some psychic protection. There are books written on the subject, but in addition there are some Flower Essences you can use to help protect you. The ones that spring to mind include:
* Walnut - Bach or Healing Herb
* Angelica - various
* YARROW (a MUST HAVE), Flower Essence Services ("FES") and others
* St. John's Wort - FES
* Pennyroyal - FES (I think I'm remembering that this is one)
* Dutchman's Breeches - Pegasus
* Fly Agaric - Canadian Forest
* Shamanic Extraction - Angelic Essences
* Angelic Sword - Australian Bush
* Liriope - Earthfriends
and I'm sure hundreds of others
The first four to six are really more your everyday kind of psychic protection. The others are more special purpose. You can use any of these first 5 on an ad hoc basis -- that is, only as needed. Say you're going to go out among people including lots of people you don't know -- you can just have a dosage bottle handy and preferrably with you and take several doses before and during your experience and stop when it's over. Works beautifully.
Of course, you can also just surround yourself mentally with psychic protection, but I like the assurance of FEs -- I sometimes forget the visualization and even if I haven't, sometimes still let my guard down. The FEs will not just help prevent the type of experience you're having -- whether a hitchhiker or just absorbing that person's negativity -- it will help keep you from feeling drained when you've been out and about absorbing everyone else's eneergy (if that's a problem for you as it for so many people who might frequent this forum).
There's also a wonderful Essential Oil from Young Living Essential Oils called "White Angelica" which is a very beautiful oil combo that offers great psychic protection including after the fact. (Disclaimer: I don't have any current relationship with this company.) I've come home with my solar plexus in a torque and dabbed some of that on my upper chakras and pretty soon my 3rd chakra settles down (blessed relief).