So I'm 12 dpo. I have 29 day cycles so I'm on day 27. I tested this morning and I got bfn, I've never had super itchy nipples before I start my period. my boobs are very veiny, sore, full, and my nipples have been itching like crazy. I took the 88 cent test from Walmart and in not sure if I took it right because I put the 3 drops in and it didn't go so I put 3 more in. any advice?