With respect, this needs a phone call more than a prayer or yahoo answers. There's a very easy, foolproof resolution: go ahead and request a test as soon as possible. Sure, you don't like needles, but you also don't like sitting for four months thinking you might have HIV. There will be something inexpensive in your area.
For what it's worth, people get HIV tests all the time who aren't concerned they got it from sexual or drug-related activity. Virgins can get HIV tests for valid reasons. Sex and unsanitary drug use are the most common modes of transmission, but it's better safe than sorry and it's better knowing than fearing.