Is Benadryl safe during pregnancy?

I’ve been taking Benadryl for a while because I have issues with pollen this time of year. I’ve read conflicting things online. I’m 12+2. I’ve been taking one or 2 a night just to clear me out enough to go to sleep. Now I’ve read some studies that say it can increase the chance of cleft lip if taken in the first trimester. Help I’m freaking out…

Thanks and kind words please. I’m new to this