I keep track of my period using a tracker, and it hasn't failed me yet- I'm always right on time, but last month that changed. My husband has been overseas for a year and just got back last month, the day my period was due, but it ended up being 5 days late. I put that into my tracker and it updated my "schedule" for this month.. But again, I'm almost 4 days late. We only use the pull out method, so I'm worried I might be pregnant. I've been expierencing lower back pain, and mild cramping like I have when my period is coming.. Also, there's a white discharge but I haven't noticed any spotting or anything like that. I'm wondering if it's the stress of having my husband home again after so long, or could my hormones possibly be messing up due to having sex regularly after not having it for a year? I've taken 4 home pregnancy tests and they've all been negative. They were all "early detection" tests and I took 2 before my period was due, one the day it was due, and one after I was 2 days late. Clear negatives. I really don't want to be pregnant right now and was planning on getting on birth control after this period. If anyone has had a similar experience please help. Thanks.