my body is driving me crazy!

I am now 21 days late but it's been over 4 months since I've had sex. I'm having stomach aches, bloating, discharge when I pee, my emotions are crazy, and I weigh alittle more than normal. I'm underweight and I've been stressed out so that could be why. I'm just so confused about what's going on. If anybody has any thoughts or experiences to share I would greatly appreciate it.