I'm not sure where to start with this.. But I'll be two weeks late this Saturday. I have been taking Pregnancy tests (i have taken 4) but they've been Neg. I think the last one I took was Monday. Idk if it's stress or if tests aren't picking up pregnancy?

I have been tracking my ovulation for a few months making sure i was getting positives because my SO works out of town right now and we want another baby! I've always gotten positive Ovulation tests for 2 days. This last month my SO came home the week i was supposed to be ovulating but i never got a positive test, but i was spotting during that week!? I know it's possible i could have missed it with a test. And now I'm almost 2 weeks late. What's your thoughts?