When I found out I was pregnant I was 8 days late on my period and I thought that maybe it was because I had a bad car accident the month before and had surgery to repair the tendons in my fingers and I was super stressed out on a bunch of pain medication and I figured it was just stress, then I started what I thought was my period lasted 2 days seemed medium heavy for me then it just stopped and I was thinking okay it's def stress. So few weeks to a month go by and I noticed my breasts were severly tender and sore and kinda hard and on top of that I was grumpy and over exhausted. I talked to my sister about it and told her I thought my hormones were jacked up from the surgery and she said ehh I dunno go take a test so I did and less than 10 seconds BAM!! I was shocked not really sure why, cause I wasn't trying to prevent it, but I found out that the bleeding I was having was from implantation bleeding! and now I am 16weeks pregnant and my bf and I had been having unprotected sex, but not trying for over a year and all of a sudden it just happend! It's very possible you could be preggers

So just take a test and see what pops up might suprise ya!