Input Please

So, I have taken countless pregnancy test both urine and blood and all have came back negative. My last technical period was in September and spotted two months since. I have been bloated, extremely tired, slight cramping, sensitive breasts, sensitive smell, nauseous, headaches, body aches, backache, congested, moodier then usual, phantom movement, oily skin/breakouts, and got a fever out of nowhere yesterday. I know some of these aren't pregnancy signs, and others could be caused by something else. I'm just curious as to what everyone else thinks might be causing my symptoms.