Elchwong, Flu and fever will not affect your baby. However, it is best that you don't self-medication. Pls see a GP and tell him/her you are pregnant so that he/she can give you appropriate mediciation which is safe for pregnant woman. Take care ya!
Buffy, for my gynae, 1st trim she is seeing me every 3 weeks. 2nd trim, she will see me monthly. I think from 30 to 33 weeks onwards, she will see me every 2 weeks and finally every week at 36 weeks or so. This is provided there is no problem in my pregnancy.
For my 1st pregnancy, I got spotting in my 1st trim so she see me more often to monitor during that period.