Dreams like yours can often be rich in symbolism and emotions. Here are some elements to consider in your dream interpretation:

1. Leaving a Party: This may suggest a desire to withdraw from social situations or a feeling of being overwhelmed by your current social life. It can also symbolize a transition or change in your life.
2. Being Drugged: This could represent feelings of vulnerability or loss of control in your waking life. It might indicate that you feel someone is influencing you or that you are in a situation where you feel powerless.
3. Crowded Elevator: Elevators often symbolize transitions or moving between different levels of consciousness. A crowded elevator might reflect feelings of pressure or being surrounded by people but still feeling isolated or anxious.
4. The Guy in Hockey Gear: This character may represent a positive influence or someone you admire. His friendly demeanor could signify a desire for comfort and reassurance in your life. The fact that you've dreamed of him before might suggest that he embodies certain qualities you find appealing or comforting.
5. Waking Up in Your Brother's Bedroom: This shift in location could symbolize a feeling of regression or a need for safety and familiarity. It may also reflect familial connections and the influence of family on your life choices.
6. Testing for Pregnancy or STDs: This part of the dream could indicate concerns about health, relationships, or consequences of past actions. It may also symbolize anxieties about intimacy or the responsibilities that come with it.

Overall, this dream may reflect your feelings about control, vulnerability, and social dynamics in your life. It could be helpful to reflect on your current relationships and whether there are any areas where you feel pressured or anxious. Consider talking to someone you trust about your feelings, or take some time to explore what aspects of your life are causing you stress.