My girlfriend and I made out with each other in the back of my car on 1/19 and we without disclosing many details, I'll say my private parts had my underwear, my jeans, and her underwear in between her private parts. I may have cummed a little and perhaps she did too but our private parts were never disclosed (together aka sex) once during our make out.

My girlfriend's periods usually arrives on the 21st or 22nd, but it hasn't yet and here I am on 1/30. We took a pregnancy test (First response, 6 day early detection) on 1/25 and it came out negative. I'm certain I did it correctly. I had her urinate in a cup, I placed the test in the urine for 5 seconds and placed it horizontally down for 3 minutes. 

I'm terrified my girlfriend is pregnant and I'm looking for any advice anyone can offer me. I would also like any advice about what I can do if things go south and a baby is on it's way. Would abortion be a good idea and any info on it?

Please keep in mind we are both minors (17 & 16 yrs old) and we're terrified we may have conceived a baby. It may be a gift from God  but it would destroy our lives if such an event happened this early for us. We're novices at this sort of stuff as well. Thanks in advance.