14DP IUI brown discharge???

Hi,
so I need some opinions on this, and was wondering if anyone has ever experienced anything similar and got a BFP? TMI warning....I'm 14DP my 6th IUI today. Yesterday I had AF like cramps, thought it was coming. Instead, I had a beige discharge. AF cramps on and off during the day, mid afternoon light pinkish discharge 2x, then nothing all night, except cramps on and off, and frequent bathroom visits. This morning I took 2 HPTs. One IE cheapy super early HPT, and a clearblue, both BFN. On top of that, I had brown discharge 2x so far, and only when wiping.  Mild cramping off and on. I've been having headaches off and on since the IUI, dizziness for about a week. I had a chemical in May, and had similar symptoms + some others, but spotting started earlier. AF never comes like this for me, it always hits full force, and bright red. I NEVER spot, especially not a day ahead. I'm worried this could be another chemical. I'm wondering if I could still get a BFP? Maybe my HCG levels are not high enough for the HPT? I have sore bbs too (they hurt on the side), which is different from the AF bbs tenderness.
Thank you for all replies!!!!