confused?!?!?!?!

Last month was my first full normal cycle after being on birth control for years. I started on the 7th and ended a couple days later. On the 17th I had extremely clear stringy discharge I noticed after my boyfriend and I had sex. That's a sign of being fertile, right? Fast forward until about 2 days ago. We had sex and I had this weird pink brown bleeding?????? I've been feeling super sick lately. Yesterday I started getting cramps in my uterus. 
Today I started getting this clear/creamy white watery discharge?????????
We are currently trying to concieve. But since I was on birth control so long I no longer know if any of this is normal or if I could possibly mean pregnancy

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