Help !

This is the second cycle in a row that I have been late. Last month 2 days late by day 3 I was spotting. This cycle mid ovulation I spotted pink about a quarter size and now I'm two days late. I took a family dollar early predict test and it was negative. What is going in with me. Every time I end up taking one and its neg I get sad and depressed. What's going on with my body. I'm tired of getting my hopes up. Please let me know. Thanks !