Waiting to miss my period is torture!

I know only a pregnancy test will tell for sure, but like everyone else the two week wait is driving me insane!

I am about 10 DPO. I have headaches, mild to moderate nausea that comes in waves, back pain, mild period like cramps, and I'm about twice as tired as I am usually. I think my nipples might be sensitive and sore but it's hard to tell.

I checked my cervix, and it is high (took my entire finger to find it), pretty closed, and firm. I know it's usually soft with pregnancy, but shouldn't it be lowering and opening soon since I am 6 days from my period? Sadly I do not check my cervix routinely so I cannot compare. I will definitely start doing that if I get a negative.

Sometimes when my symptoms are mild I think, "It's all in my head." But when they get stronger I think, "I'm sure I have something going on." If I get a negative I will have to have the doctor do a physical or something, since I should not be feeling this under the weather if it isn't pregnancy.

Also, I've heard about the metallic taste women often get in their mouths with pregnancy, but what about just a bad taste? It might be metallic, but I would describe it more as just being bad. I tried gargling but it came back pretty fast. My mouth also feels sort of tingly. I would also say the taste sort of sits at the back of my mouth, kind of at my throat.

I'll have to see how long it lasts. If you had it, how long did it go on for? Did it come and go?