am I pregnant????

so I had unprotected pullout sex about 2 weeks ago.. And now my period is 5 days late and I started spotting.. but on the other hand, my period is late pretty regularly because of my wonky hormones (and sometimes I just blatantly skip months) but I never really spot, I'm scared it might be implantation bleeding.. is it worth investing into pregnancy tests, or should I worry a little less??

P.S. I know that was irresponsible of me!! I plan on building the courage to ask my doc about getting an iud soon..