I think maybe if you were that constipated you would feel very constipated and quite uncomfortable down there.....I have been that constipated before and there is no way I wouldn't have noticed the sensation of it being THAT clogged up, it was horrible! But I don't know enough about it to know if you could get that that point and not feel it?
You said you feel fine now but have you had any pain or felt off at any time since it started? Just wondering if it started as gastro but your bowel hasn't sorted itself out yet, it can take a couple weeks to be totally back to normal even after you feel well.