welcome to Health care magic.
1.It all depends on the what kind of the cyst it is,
simple cyst ,complex cyst, size of the cyst all depends.
2.If the cyst is so symptomatic, discuss with your treating doctor.
3.If aim your treating doctor i will not take that risk, as it will be risky in-between.
4.why do you want to have sex despite of cyst pain,
pregnancy, first solve problem with the pregnancy.
5.Wisit your GP as soon as possible and get the needful things done.
Hope it helps you. Wish you a good health.
Anything to ask ? do not hesitate. Thank you.