Positive OPK

[B3th]

I had a positive OPK on 18th April a negative one 19th April then the past 2 days 20th & 21st April positive again. I'm so confused. I had EWCM on thr positive opk days but none on the 19th which was the negative. Can someone shed some light please?
TIA xx

 

[Isitmyturn]

Could have ov'd twice?

 

[B3th]

Could have ov'd twice?

I'm not sure. I'm thinking I'll just have to keep testing and dtd and see what happens. It's strange x