Uhm. If it's been that long and is still swollen, you should probably go to the doctor- and if you went closer to when the bite happened, you should at least call. Swelling shouldn't last that long, and the longer it lasts, the more likely it is that something's perpetuating the issue, and it's also possible it could be infected. If a doctor is 100% out of the question, taking allergy medicine like Benadryl, and Tylenol or other anti-inflammatory/fever medication can help manage discomfort. There are also non-prescription steroid creams that can be applied to the bug bite to help reduce itching, inflammation, etc- hydrocortisone cream is the most common- but you have to be careful with them. There's also supposed to be anti-histamine creams, like Benadryl cream, that will help handle the itching and swelling. For more "natural" relief, putting cold on the swollen area should reduce swelling. For itching you can make chamomile-and-green tea (make sure you aren't allergic to chamomile, of course), and either dampen a cloth with it and let the cloth sit on the swollen area, or you could add a small amount of the tea mixture to ground up oat meal- unflavored, mind!- and make a paste out of it and just coat the area with it instead of making sure a cloth stays on. I really feel the need to add that, if it stays swollen for more than a month and you haven't gone to the doctor yet, you really should. Especially if you've had any fevers, chills, unusual soreness of the region, have noticed unusually colored or prominent veins or streaks heading toward or away from any open wounds, or the area around the open wound/where the bite was feels abnormally hot to touch- all of those are symptoms of an infection, which would explain why you were/are still swollen.

no a spider