Vitamins/other supplements okay to take?

Before finding out I️ was pregnant, I️ took an antihistamine (Claritin) and a probiotic. Both are for my allergies. I️ could probably be okay without the Claritin but the probiotic keeps my dishidrotic eczema flare ups under control (it’s caused by a severe nickel allergy and reactions from nickel naturally occurring in foods, all of which are healthy and good to eat, like whole grains, leafy greens, etc and is really painful).

Anyone know if these are safe to continue to take? I️ vaguely remember my ob saying it was fine when I went for my annual exam but I️ feel like I️ might be making that up! Thanks in advance.