It is most likely that wax has accumulated in the ear and causing your problem, esp since you say that you use Q tips. It is inadvisable to take over the counter drugs. Stop the decongestants and start using a wax dissolving agent. After 4-5 days of use visit a ENT specialist
to get your cleaned.
I hope you found my response to be helpful and informative. If you have any additional concerns I would be happy to address them.