Tearing during sex

I’m 8 months PP (c-section) and the last few times my husband and I have had sex, I’ve noticed bleeding afterward. I had some the first couple of times after our son was born, which my doc warned me about, but he said it would get better. And it did for a while, but the last 3 or 4 times, I’ve had light bleeding afterwards, sometimes for a couple of days. Last night after we had sex, I noticed the bleeding again when I went to shower so I decided to investigate with a mirror. I noticed I had little tears in my perineal area and a small one on the skin right above my clitoris. It had been a while since we last had sex, so we got a little worked up and we’re a little rougher than usual, but I’ve also noticed that I’ve been dryer than I used to be, I think partially from hormones/birth control and partially because I don’t drink enough water. We use lube and it’s the same kind we have used for a couple of years that has worked well for us, so I don’t know if I need to try a different kind? Any advice or tips or encouragement would be appreciated. My husband is frustrated because he thinks he “broke” me and I’m frustrated because I feel like I’m “defective” because of all of this stuff that’s changed.