I started taking ortho tri-cyclen lo in may the sunday after my period. I was previously on cyclessa for 10 months... I think that pill was too strong... It was giving me terrible migraines. I was off the pills for a month before starting ortho. I got a normal period in may and june. In july I had spotting for 6 days the week before I was supposed to get my period. Then I did not get my period the week I was supposed to. The week that I had the spotting, I had cramps as well. I took a pg test on saturday morning and it was neg... So what does this mean? Is my body just trying to adjust to the new pill... Could the pg test be wrong? Is the pill not strong enough? If it is not strong enough does that mean it's not working? I did have unprotected sex with my bf about 2 or 3 times between june and july. I do not miss pills ever!!!!!!!! And I take them at the same time everyday like clock work. This has just really been on my mind. Any help would be appreciated. Thanks!