help me...

so my AF was due the 8th.. I took 2 tests a week before it was due one looked faulty and another looked faint.. I've had really bad constipation for 2 weeks sore boob's and I'm breaking out soo bad and ready bad lower back and stomach pains. what could it be. could I really be pregnant.? I'm broke right now and lost my job so don't really have much money to buy a test yet I just need opinions.. could it be a late non normal AF like always, something more serious, or pregnancy