You can go for Providac Probiotic Capsule. Probiotics need adequate fiber to feed upon and then populate the gut. Therefore, you need to consume adequate fiber 14g/1000kcal, daily.
It is unlikely for deranged gut flora to be the sole cause of anxiety.
Next Steps
Consult a General Physician / Psychiatrist for anxiety management.
Health Tips
You will need to continue your intake of fiber-rich foods to sustain good gut flora.