Eliana you didn’t answer whether you have anti-virus software installed or not, which aaho asked…please make sure and if you do have it hopefully it checks for spyware too, make sure you do a scan on scheduled times.
hopefully it’s your own personal computer you’re using and not a public one, if it is a public computer make sure you take precautions like uncheck the “Remember me on this computer” box and hopefully you remember to log out before you leave…