My last period was April 8-13 and my boyfriend and I had sex on the 14th then on the 19th and 20th. We use the VCF strips and they've always worked great for us (no babies for 2 1/2 years!) but I noticed after we were finished on both the 19th and 20th, that the strip had actually come out during sex at some point and was stuck to my leg! So basically we had trace amounts of spermicide as "protection". Well that was just about the time my period app said I would be ovulating. The next day or two I had some mild cramping, much like I get before my period, and a little brown discharge. The discharge only lasted one afternoon. Then nothing. I'm very regular with my periods. Always between 29-31 days. At this point I'm about 4-6 days late and I'm extremely fatigued and gassy/bloated. Ive had some feelings like I may be about to start but when I run to the bathroom, nothing. I took a First Response test but it came back negative. I have never been pregnant and I'm wondering what in the world is going on since the test was negative. Any thoughts would be appreciated!