We have been TTC for almost 2 years for baby #3. It's been 4 years since we conceived #2, so my memory is vague. I am CD 17 and had a negative OPK at 5:00 this morning. We had sex right after the test and my parter almost came but not all the way. Is there still a chance that pregnancy can occur? I usually have a positive OPK on day 16 or 17 on my normal 31 day cycle. This past cycle was off. It was a 28 day cycle. I bled less than I normally do days 1-2 and the spotted days 3-4. Started 100mg of Clomid days 1-5. Took a pregnancy test on CD6 and I got a negative. Started OPK testing in day 10 and nothing so far. I have cramping on both sides, but I cramp all cycle long.  After 2 years I am getting impatient.