My period is irregular meaning I get it in 2 intervals of 4 twice a month and I have missed all 2 intervals of last month and am late for the first one of this month. Meaning I am 19 days late with symptoms like headaches, back pain, cramping, becoming quit irritable, & tired 24/7 I've been under the same routine not under any stress. My period is irregular but comes at the same time every month ; I keep track on a period tracker. I look a test today but it came out negative, could I still be pregnant or could my cycle be changing? P.s a week after I had unprotected sex I Had brownish mucusy discharge for 4 days like a light period. The discharge haven't stopped but I haven't bled since, someone pls help me