Pregnancy symptoms

I know this is a forum for women who already know they are pregnant, but I had a couple questions. I feel like I know when I conceived but I took a test today and it was negative so I'm going to wait until next week to take another. My body just feels different. I've been getting period like cramps for about 2 weeks which was whatever, but then one night before bed my nipples were so sensitive and sore and ever since then they've been hard and sensitive which has never happened before a period. Only my breasts have hurt but this time it's only nipples and my breasts are huge. Then last week I was on my way home from work one morning and I felt so nauseas I thought I was going to have to pull over to throw up. Since then I've had frequent nausea. I've rarely had heartburn before but in the last week I've had it multiple times after I eat. And don't even get me started on the bloating! Everything I eat or drink I get extremely bloated. When I get hungry, I get starving like I haven't eaten for days but I don't crave anything in particular. I've had a few hours of light brown spotting and a few days of creamy discharge. So just to ease my mind a little before I test again, I was wondering anyone had any input as to if this seems like very possible pregnancy symptoms? Also I was on the implant for 3 months and haven't had a period since July, so could that be why I'm getting some whacky symptoms before a period?

Anything will help thanks :)