You Can take benadryl, tylenol, and robitussin
I have a list of safe meds in my journal you can have
Extra Strength Tylenol is what my doctor usually recommend for those symptoms . Also for headaches you can try Head On or if you prefer an alternative you can drink 4oz of caffeine like soda iced tea or green tea. For a stuffy nose you can try normal saline drops , xclear nasal wash (over the counter) or an alternative is eucalyptus inhalants
What I do as well when i feel like im coming down with something, other than taking my prenatal vitamins, i take vitamin c and zinc during the first onset of symptoms. You can ask your doctor as well before trying all these suggestions