- hi, I was bitten by a white tail last night and straight away I could feel it swelling and the pain was like a pinching pain and burning. I caught the spider in a jar and it is about 20mm. but this morning all I have is a little bruise and no side effects, which is good coz I was worried coz I'm pregnant. I was just wondering what the chances are of finding another one in my room tonight, do they travel alone??