Advice please!

So I'm loosing hope this month... I'm 10dpo and I tested this morning and got a BFN... What dpo did you get you ladies get your BFP?
My AF isn't due until 5/24. I have been having cramping on my right ovary for the last 4 days. And I have been sleeping ALOT and have had headaches... My boobs aren't sore and I have no menstural type of cramps, when usually I have both of those symptoms at this point.. I Ovulated on 5/11.. & me and DH BD'd everyday! 
​Any advice?  I'm driving myself crAzy in doubt that I'm out for this month 
​Anyone have a similar situation?