Membranes swept - cramps or contractions

Ashley
39 weeks 1 day... Had my membranes swept this morning...
FTM... How do I tell if I'm just cramping from the sweeping of my membranes or if it's minor-mild contractions???
The cramps are in my lower abdomen, some one sided and others sharper than the previous... then some weaker... Occasional sharp cervical pain... They tend to be 15-20 minutes apart...