Can I pair my non-hormonal iud with another form of birth control?

I’m about to be a freshman in college. I don’t want kids until after I graduate, feel that I’m with the right person & am financially, mentally, & emotionally stable. I got the paragard placed in 2 days ago, but I have heard of accidental pregnancies. I plan on using condoms in the future (I’m not in a relationship rn & not sexually active). I’m just so scared of becoming pregnant. I want to be able to give my child the world & all of my love/attention. I want to welcome him/her into his/her own room, own space, own home.