Hi I need some advice please!

Leighvie
I'm in my 20s and ttc. My SO works away so before he left we tried and tried. I had PCOS wen I said had the last scan in December they couldn't see any cysts at all! 
I was just wondering if anyone knows when you can ask your doctor for a blood test for pregnancy. My doctors aren't the best. I have had cramps since the start of the month as well as nausea and a headache that has not left at all since 3rd June! My app says I should take a test in 16days because of my irregular periods but I'm not sure f that's right becaus the last time we tried would have been 29th/30th may before he went away. 
Any help will be really useful thanks! 

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