Hey uh, I left my heatsink out for a night because of personal issues while installing my ryzen 3 1200. Do you think it'll be okay if I leave the dryed thermal paste on and overclock my ryzen 3 to 3.7 with the stock cooler?
No, you need to reapply thermal paste again. And for overclocking, you need a better cooler, not stock one.
The stock cooler is fine for an oc up to about 3.8ghz. If the cooler hasn't previously been put on the cpu the paste will be fine. If it did however new thermal paste is required.