Hi Berry, any illness or stress can have an effect on when and if you ovulate. Sometimes illness or stress will either postpone ovulation, or prevent it all together in a cycle. I hope this is not the case for you and that you ovulate on time.
The only effect I've heard about it having on actual conception is still under debate. Some say it might be possible that the increase in white blood cells in your body while they are trying to fight off the illness may try to also attack your partners sperm. Sort of like them being on "heightened alert" and attacking anything they don't recognise. But again, it's still under debate and needs to be studied more, so don't let that stress you even further.
Are you temping and charting? You might find that your chart is a bit all over the place and doesn't give you a clear pattern this cycle if you had a bit of a fever. Hopefully all your other symptoms are able to tell you what your body is doing.
In any case, best of luck this cycle!