I'm not a doctor but it does not sound to me like you have a hernia, from my understanding, if you have a hernia in that area, it is usually a break in the wall that separates your inside item's from that area, I guess that your insides will start coming through the little break in the wall, in my case it felt like a fatty tissue, but did not hurt when I applied any pressure,
in my case it was just that a fatty tissue, I was told it could be part of my intestines poking through, but if that would have been the case it would have hurt when pressure was applied. The only real way to find out is to be examined by a doctor, I was afraid to go and waited too. But I went and that's the best advice I can give, I own a moving company and have moved furniture for 23 years and have never had what you described happen lifting anything. After my hernia, they removed my staples in 3 days and I was back to work on the phones only in 1 week, and back to normal in 3 weeks.