Is it normal to feel this way after giving birth?(adult content) plz help!!?

I have alwaysed had a huge sexual appetite fom the age of 16, I had my first baby 2 months ago and I'm now 22 and my appetite towards sex has increased majorly, when I was 9 months pregnant I didn't want to at all but ever since I gave birth I want it everyday and if my husband refuses I end up masterbating, is this normal because I've heard that after giving birth women are no longer interested in sex, but I'm not that way, if I go just one night without sex or masterbation I get mood swings, its difficult because my husband only wants sex twice a month, so is it normal for me to want it all the time?