Phenyephrine is routinely prescribed after the first trimester.
Dextromethorphan and Guiafenesin are also routinely used but are pregnancy cat. C meaning there isn't significant human data to show if there are risks.
Personally, I have taken dayquil which contains all three of the above during pregnancies with no issues.
Antihistamines like benadryl and other allergy meds like zyrtec and claritin are considered safe as well.
If you have any concerns, just call your docs office and ask the nurse what your particular doctor recommends.
What are soothers? Like cough drops?
not sure what others you can take but u can have soothers i would get in touch with your midwife before taking anything else