Worried

Okay girls... I have to take Xyzal every night for my allergies cause there horrible. But I’m also taking prenatal vitamins. I tried taking the vitamins in the morning but I just can’t do that cause I don’t really eat good in the mornings. So I took my prenatal vitamin last night with supper and then took my allergy pill an hour later. This morning when I woke up I felt a little off like the room kind of spinning and kind of clumsy walking. Can anybody help me on what the heck went on? I’m sure it would be okay to take both at night cause I have researched and just couldn’t find a reason to not take them both at the same time.