Please help!

Okay so story below; 
- I took a pregnancy test on the 21st &22nd of April and they came back faint positive 
- 23rd April I had my period, was like a normal period so I thought I had a chemical pregnancy. 
- period ended 27th April & I had sex. 
- 28th April I had sex too 
- 1st May I took an ovulation test which was a strong positive 
-ever day since the 1st May to the 11th May I've taken an ovulation test and they've all come back positive. 
- I've had sex several times in between those dates. 
-2nd may I took a pregnancy test which came back negative. 
I'm wondering if I am somehow pregnant? I find it weird that from 4 days after ending my period for 10 days straight I've had positive ovulation tests.. 
below are the ones from the past 3 days, in person they are all the same colour which according to my kit means I am ovulating. 
Is there still a chance of pregnancy that isn't being picked up by the pregnancy test because it's too early? 

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