promethazine or normal

So I’m sat here at 3:35 awake, too scared to go back to sleep. I’ve recently started taking promethazine for sickness, tonight I had a really bad nightmare woke up sweating thought I could hear my boyfriend screaming but he’s not here. I don’t usually get nightmares but read the side effects for this antisickness drug can cause nightmares. Shall I stop taking them and ask my doctor for something new. I know vivid dreams are normal in pregnancy but this was different and it wasn’t sleep paralysis. I’m 13 weeks pregnant I have been taking this medication for 3 days so it’s defo in my system.