J.S.
Isn't this the story of our lives! First find out from your doctor the real deal. Usually home tests are negative first then really end up positive not the other way around.
Concerning the financial factor. Consider family support. Termination should be the laaaaaaaaaaaaast resort. There are also Social Assistance avenues to consider. A new baby would be so nice for your son...but talk to the father first just tell him the truth and last do consider really effective contraception if more babies are definately OUT!
J. S