Could I be pregnant?

So we had sex on the 21st, and felt a lot if cramping on the 23rd, on the 27th, I am seeing that bright pink when I wipe but I am seeing the light brown in my underwear which I think is the dried or older version of this pink stuff. Partner does have a larger than average "you know what", I just never had this show up anytime after. I did get a little nauseous while swinging with my daughter to the point where I had to stop on the 26th, at the beginning of drinking alcohol on the 23rd, and all my junk foods tasted gross including my beloved cheese pods, but my partner suggested steak and eggs for breakfast and that was perfect. I also couldn't jog for my full time, and I ate a whole bag of sour gummy worms, like they were the best thing in the world. So.... so anyone who has gotten pregnant multiple times or something, anything sound familiar?