Your hair is growing in really well! Welcome to the forum Do you think your shedding is related to taking accutane or has it always done that? Hair loss can be a side effect. Your hair doesn't look thin to me though, just a normal density.
One thing to keep in mind is that if stretching washes makes your scalp itchy, irritated or flaky, you should actually wash it more often, as the inflammation from having a dirty scalp can contribute to hair loss. I also have fine oily hair and it's hard to find a balance cause regular washing is good for my scalp but not so much my damaged strands! At the moment I wash every second day, but was washing daily for about a year.

Best of luck on your hair growth journey!