Is this a cysts?

I’m 4 weeks pp this came up about 2 weeks pp it’s hurts to touch and it’s hard It’s gross and pretty uncomfortable it’s almost in the crease of my leg I just want it to go away I thought it was an in grown hair at first but I can’t find a spot on it where the hair follicle would be pls help I plan to call my ob but I don’t want to over react my husband says it’s probably just an in grown hair but I feel like it would be gone after 2 weeks if it was no rude comments pls tia