leaking fluid?

So last night I inserted Evening primrose oil before I went to bed and got up to pee 2/3 times in the night like usual. When I woke up this morning I noticed my pj bottoms were a bit damp feeling. Do you think this is the evening primrose oil 'leaking out' or could it be my waters? I was wearing a pad and have inserted them before and never had this happen before.. added pictures of front and back. Sorry for tmi.