Reishi might have some mild anti anxiety properties but it is mostly used to boost immune system. So taking reishi will any way not help much. However it will not harm the foetus in grave way as organic is always good. You also need to start on folic acid and iron &
calcium in your 1st trimester. During pregnancy most drugs are avoided to keet the baby safe. If you still face anxiety issues i would advise to meet up with your psychiatrist as well as gyenacologist. Pregnancy blues is a common issue and can be easily dealt with.
Next Steps
visit gyenacologist
Health Tips
meditation often helps relieving stress