2nd trimester contraction type feeling

Ever since 22 weeks (I’m now 24) I started feeling this weird sensation - it’s inside the mons pubis area and it will tighten/squeeze internally and hurt just for a second or so - my stomach doesn’t feel hard and it’s different than a contraction I’ve felt in labor - it’s a tightening deep inside pubic area just for a second and painful. I don’t know what this is. I’ve never had Braxton Hicks and from everything I’ve read this doesn’t sound like it. Sometimes it will happen once a day other times it will happen like 5 times in 10 minutes. I don’t know if it’s a spasm or contraction. I see my doctor this week but this worries me