What you think?

L
So my last period started Jan 4th & it ended Jan 9th, so on CD6. In between, my SO and I did have unprotected sex between days 10-16. About CD19-22 I experienced, what i believe, was implantation bleeding because it was extremely light and it disappeared completely without ever increasing in amount.
---------
As day 28 approaches, I'm certain a test will be positive if I take one; I was so certain. "One line, hmm.. Anything faint? Nope.." I threw it away and decided to test after 3 days with FMU... I was almost sure again, but another negative test and still no AF & it's now CD31.
------
Since then, STILL no AF & I'm technically on CD44 now & my cycle has never been this long. I'm not stressed about anything. I've noticed nothing but weird symptoms, like more perspiration, crying for everything, gassy, bruising, random running/bleeding nose... It's retarded and random as hell. I haven't retested because I'm so scared to get another BFN
-----
I have a sonogram next Tuesday that was scheduled to check my ovaries and uterus before TTC, but it may just turn out to be a first pic of a little bean.... I'm terrified! I'm gonna totally tell the girl at my OB that I can't give a urine sample and hopefully just see a little baby on the monitor; my doctor is gonna be so shocked! Lol 
-------
Has this happened to anyone else? I bought the cliniguard hpts off amazon and those were the tests that gave me negatives. I test the day before AF was due & the day after AF was due. Have any of you had these weird symptoms?