I bruised so bad!!

I don’t know if it was just me or maybe it was the wax? I’ve waxed many times before but when I use this on my bikini line, after I was done I was so badly bruised. I’m talking dark purple bruising on my complete Bikini line. I’ve been waxing for years and this is the first time I’ve ever had a bruise. So maybe I use the wrong strip? Maybe I should’ve used a bikini strip instead of just a body and legs? Nonetheless, I was so disappointed by the waxing job. To be fair tho, the product gave me a clean close wax, it’s the after effects I’m not liking.