I couldn't resist doing a more complete and hopefully totally unnecessary analysis of qualification scenarios.
Basically we advance if:
1. US wins or ties against Guatemala
2. Jamaica loses or ties against A&B
If the US loses to Guatemala and Jamaica beats A&B, things get a little more interesting. The US currently has a +3 goal differential and +3 goals for compared to Jamaica. Tiebreakers in order are
a. Goal differential
b. Goals for
c. Head to head points
d. Head to head goal differential
e. Head to head goals for
In the even of a tie on a. and b., the US and Jamaica are also tied on c. and d., however Jamaica has the edge on e., thanks to their 2-1 win vs our 1-0 win.
This table should cover potential outcomes when the US loses and Jamaica wins.