Hello ma'am, thank you for your question, and congratulations!
There are several Benylin and Nyquil products with different ingredients. If you tell me exactly which product you took, I can research their safety during pregnancy.
However, the majority of the ingredients in these products are as follows:
doxylamine, pseudoephedrine, phenylephrine, dextromethorphan. The 2 decongestants (in bold) are usually best avoided in the first trimester, but inadvertent exposure to them once or twice is unlikely to cause a problem. Just mention it to your doctor at your first appointment.
Unfortunately, COVID carries a higher risk of complications in pregnant women. However, if you have had a positive test, it may provide similar protection as a 3rd dose. If you still want to get a 3rd dose, it is recommended that you wait ideally 3 months following the illness, and at least 8 weeks. Vaccination is strongly recommended for pregnant women, for influenza and COVID, and is safe.
I hope this has been helpful to you, and please do not hesitate to contact me if you have any further questions!
Tom Samaha, Pharmacist