I was bitten by something (possibly horsefly or spider?) the day before yesterday. It was painful (but not itchy) and swelled up considerably, till today where I've noticed the swelling to have reduced. However, I have a fair bit of neck pain radiating into my left shoulder, and an odd sensation in the left side of my face. There also seems to be a couple of small superficial nodule-like lumps that have developed lateral to the bite. I should mention the bite is just below the occipital region, left of midline. Is it worth having a physician look at it, or would waiting a few more days for symptom resolution be a preferable option?