Contractions on one side: Real or BH???

M

I’m 38 weeks today and have been having mild “contractions” (maybe, I’m not sure - just kind of feel like side cramps when you run) but only on one side. They hurt(ish)...are they real or just Braxton Hicks? I’m a second time mom, and had contractions with my first so I feel stupid for not knowing. Just not sure if I’m trying to convince myself I’m in labor or not...