What's going on with my body?

[VeganEmma]

I am so confused. I don't really feel pregnant but I cannot explain why certain things going on with my body. Yes, I have taken a million tests- all negative but I can't figure out what is wrong with me and of course google has told me its possible to be pregnant with neg test and periods... anyways, here is what's going on with me.
1. darker nipples
2. weight gain
3. moodiness, tiredness
4. shorter than usual periods- my periods are always 7 days and to have a 5 or 3 day period is very weird for me. Last month was a 5 day period and this month was a 3 day period (my implantation bleeding was 3 days of bleeding with my 2nd child)
5. I just keep getting this feeling that I might be pregnant

Now I probably seem crazy and my neighbor thinks its just stress from my relationship with my SO and my mom dying 6 months ago... but could I be pregnant or am I just going crazy from stress?

[Mosaic]

If you've been under a lot of stress, it's possible that your ovulation may be delayed (or skipped entirely this month). I've always found that anovulatory cycles are rough and can definitely make you feel like you're pregnant or sick, if you're not used to them. The short period could very well be breakthrough/anov spotting.

That's my most likely guess, anyway! I hope you feel better soon!