ingrown hair or std ?

I have this bump on the side of my vagina , when I poked it white stuff came out like puss and blood. How do I know it's an ingrown hair? Got tested for stds about 3 months ago, and havent been with anyone else but my s/o for the last 2 years.  It's a couple cms out, had one before but after I squeezed it like a dent was where the bump was . 😭