Am I overthinking?

I should not be worried until I miss my period, but I am having some weird symptoms I do not normally have. I had protected sex 3 days before my ovulation day. I had my regular ovulation discharge. A week after, I had a lot of discharge along with sticky, stringy, whitish discharge. I also noticed my boobs are bigger than they usually are. Along with that, I heard an old wives tale about toddlers looking inbetween their legs symbolizes pregnancy. I couldn’t help but notice a young toddler I was playing with did that. I woke up being extremely nauseous this morning too. I am supposed to start my period in 8 days. Am I just freaking myself out or should I start buying tests? Thank you.