I need some advice :/

When my baby turned 6 months I started feeding her baby food. She was doing good, 1 week I fed her once a day so the next week I started feeding her twice a day. She was doing great and eating a lot. But now she doesn't want any, I get her to eat some but not as much as before. During the second feeding she won't even open her mouth! I feel like she's not getting enough baby food cause she barely eats it. What should I do? :( should I stop and wait until next month to see if she's interested again. I'm a first time mom and im so lost...