Signs of bladder infection?

Ree
Has anyone ever had one? I haven't! What are the signs. I have pee'd like 9 times today on the hour almost. There's no foul smell or no pain urinating, but I do have some cramping in abdominal area. I'm 7-8dpo so it's hard to know if I have a bladder infection or not with the cramps that can mirror inplantion stuff. 
This just started today and I have only had a cup of OJ today. That's it. 

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