19 DPO, AF is late and BFN?!

Hello ladies, so I ovulated on November 15th. We had sex from the 9th until the 16th. I had taken a test at 11 DPO and it looked like it had a very faint positive but could have been an evap because at 13 dpo I had a clear negative. I'm now 19 DPO and AF is 5 days late! I have frequent urinating, increase in appetite and thirst, my nipples (not my breasts itself ) have been a tad sore and they off and on again itch and are a little swollen. I cramped a little a few days back, thought it was AF on time and nope. Nothing ever since then. I guess my question is , has anyone been in the same boat before? Been pregnant, missed a period, been 19-20 dpo and then tested positive after testing negative at 11-14 DPO???