I'm so confused how do you get a positive 1 morning and a negative the next???

Crystal • Hi everyone, my name is Crystal I have 3 children 2 girls and a boy, my husband and I are trying for number 4, pray this site helps cause we haven`t had any success in about 4 months!!
I have takin so many test cause I'm so anxious! I got a positive yesterday even though it took a little bit and this morning I kinda think I see something what do you guys think?
This is positive right??