Cryptic pregnancy?

Have Hcg done, (by military) negative. Took a clear blue, negative. I’ve been pregnant before and I’m experiencing the same things. I had a week late “period” in which I spotted for two days and it was over. I’m normally a heavy bleeder and have to replace tampon and pad every two hours! I’m nauseous, my breasts are starting to get veiny. (Last time my breast hurt like the dickens!!!) no pain in them yet. Im5’0. And 85 pounds. Last time I was pregnant I gained to 97, and now I’m at 90. I have weird cravings sometimes. I’m lethargic, before the spotting I had white creamy??? Discharge. And I’m a bit temperamental. When I was pregnant my moods were off the chart. Also have to pee like crazy!

But the nausea is absolute bull. I hate it. And the doctor didn’t even know what to do.

Any advice? Insights? We’ve been TTC since January. I had an ectopic pregnancy that I had to drop in mid November (was between 6-10 w in)