There is a halacha not to launder clothes or linens during the nine days, or at least during Shavua She'Chol Bo (the part of that period that's during the week of Tish'a B'Av). Is there room for leniency where bedbugs are present in one's home and she is advised to wash linens and clothes to help get rid of the bedbugs? Is there a difference in halacha if she does the laundry before Shabbos or after (i.e. during Shavua She'Chol Bo)? Any sources or arguments would be most welcome.
Assuming that the infestation will only get worse if you do not wash the clothes I would say it's ok since it is no different than anything else you can do during the 9 days that is not for simcha or to prevent financial loss.
If the washing can wait then obviously it is better to wait after the Tisha B'Av.
For a great overview of the laws of doing laundry during the 9 days see here: