Yeast infection HELP

So I just recently shaved for the first time in a while and idk of that has any affect but lately my vagina has been itching on and off I don’t have bulbs that itch like I usually do after shaving tho and the last time I had a yeast infection was years ago and I only remember it being unbearable. How do ik if I have one bc I want to stop it before it gets unbearable