Well, you have to go through the EEOC claim first. The EEOC must issue a "Right to Sue" letter before you can file suit for this kind of incident if you are filing it under the employment discrimination laws.
You can immediately file claims for sexual assault based on the improper touchings, but it would be a better idea to wait to file all the claims together at the same time after the EEOC has issued the right to sue letter.
Victims who win sexual harassment cases in federal court can receive the following reliefs: attorneys fees; reinstatement of promotion
; compensatory and punitive damages; pay for lost wages
and benefits; injunctive relief (changes in workplace policy and practice to prevent future harassment). In your case, because you haven't actually quite your job as a result of the sexual harassment, you are looking a lower amount of recovery, but its still a good case. It will be quite a hassle though and will definitely disturb your work relationships.
On the other hand, the EEOC claim may resolve everything for you and I definitely encourage you to pursue that claim. Generally, once an EEOC claim has been filed, the sexual harassment will stop and won't happen again.