Plz help me............

So im 15 and i tried to feel my cervix.. when i put in my finger it is really tight and low and firm. Im on day 39 of my cycle (ive ranged from 24-35 days) ive had cramping and almost like, milky "dry" discharge. (Sort of smells like blood & meta)l Does this mean AF is about to start? I had sex when i was infertile, he used a condom, he pulled out and also didnt finish. Does it sound like im about to start??  Im too scared to test in case it is positive, ugh I just wanna cry and kill myself right now😂