Sertraline - is it working or not?

Hi guys, I’m just reaching out for some reassurance.

This is my second time on Sertraline for anxiety and depression. To manage side effects, I started at 25mg for 18 days and then increased to 50mg. I’m now on day 28 of 50mg.

Around days 19–21 I had some genuinely good days — I had perspective, could laugh, and triggers didn’t affect me. That gave me hope.

Since then, anxiety is still there but not as loud. However I now feel very tired, low, and somewhat dissociated. It feels different from the earlier anxiety phase and it’s worrying me.

The first time I was on Sertraline I went up to 100mg, but the side effects were stronger (GI and sexual), so I was hoping 50mg might be enough this time.

I’m nearly 2 months into treatment overall and I’m scared that I’m feeling depressed again after those good days. Has anyone experienced a dip like this around week 4 before things improved further?