Breastmilk Production

Hi all!! This is my first time posting here. I'm wrestling with some intense mom guilt. My baby girl is almost 7 weeks old. I went from being able to produce 3 ounces of milk in a feeding to barely getting getting full ounce when I pump. She's been latching on to me, but not for very long whereas she used to stay latched for her entire feed (upwards of 45 minutes total). I've been staying hydrated. pumping every 3 hours. Eating lots of oats, yogurt, homemade hummus without the tahini. I've avoided any veggies that can cause gas. What else can I do to get my milk production back to the way it used to be?? Please help me. The guilt I'm feeling is overwhelming. It feels like I'm failing to provide for her. What do I do??