Could The Weakness And Sleepiness In The Morning Be Caused By Taking Pregnacare Conception Supplements?

Hi Dr., I am TTC and also taking Pregnacare conception. Before I started taking the Pregnacare conception supplement, I was finding it difficult to sleep at night and also have bloated stomach. But now I am on this supplement, I sleeps well at night. but my concern is that i feel sleepy and weak in the morning. Though, i am no longer having the bloated stomach since i began to take this supplement. I want to know if weakness and too much sleepy is caused by the Pregnacare conception supplement. Thanks