3rd pregnancy harder then the 1st?

It took my 1 year to get pregnant with my 1st, my 2nd was so quick, literally less then a year I got pregnant. Now my 3rd is getting hard again. It's been 2 years that we decided to wait, now we're TTC for 3 months. I want to know if it's hard for anybody out there or if I should make an appointment with my gynecologist because it is extremely painful for me to have sex for the past 6 months. I'm scared I might have a cyst.