Had intercourse unprotected with the pullout method three days ago.. Since then I've been experiencing cramping, pain lower stomach. Can't eat feel sick n have been freezing. Back is hurting and I just started to get bright red blood on the toilet paper and now cramping even more??

So what is your question? Are you asking if you are pregnant? You can't tell after three days; you will have to wait until your next cycle, and even then you may not be able to tell. Wait and do an HPT with first morning urine.

So, was this your question ?

Could you be pregnant, yes of course, since you did not sue protection, even with protection there is a chance,

But no there are no signs and none of what you said could be from sex that soon. It would be weeks latter to start getting those signs.

Those can be infections,(of course) or period getting ready to start perhaps