I think I'm being Sexually Harrassed

So I have been working in a very small company for over 8 years now.  They were great with my pregnancy.  Allowing me the time I needed for my appointments and giving me 3 months off work. 

With my son Matt I was unable to breastfeed him for the entire year.  He was a lazy eater and since he really didn't latch on, it dried up.  So with my daughter I was on a mission to try again.  It was rough trying to nurse my baby in the NICU but with the help of her nurse I was able to get her to latch on eventually.  And by the time we left the hospital my milk was coming in.

Because of my Placenta Previa the doctor decided to do an early c-section delivery.  So I really wanted her to get all the benefits from the breastmilk.  When I was home I followed the same feeding schedule she had in the hospital, every 3 hours. 

Fast Forward....I returned to work when she was 3 months.  I bring my pump with me everyday to work and try to pump at 9:30 am, noon, and at 3:30 pm.  It is hard to pump at work.  Not only do I have to deal with working around my work schedule, meetings, and unexpectedness, but Sexual Harrassment?  Tell me what you think.

I carry my pump in a black bag.  I pump in a conference room that no one really uses.  It is the only place with a lock that I would be able to use.  When it is time for me to pump I inform my assistant that I am going up and she knows why.  In case anyone is looking for me, they all know what I am doing.  I store the milk in our community refrigerator in our mini breakroom.  And at the end of the day, I collect my bottles, stick them in my bag, and leave.

But here is where the SEXUAL HARRASSMENT or some kind of HARRASSMENT comes to place.  When I go to pump there is one co-worker who always has jokes.  And lately I had either ignored it, laughed it off, or just played along but let me tell you what broke the camel's back.  Please keep in mind I have been doing this for 3 months already. 

Yesterday, I had just finished pumping.  I went to store my milk in the refrigerator, and guess who was in the breakroom.  He was grabbing at his boob acting as if he was squeezing milk out into a container he had on the table.  I laughed it off like usual.  Put my milk in the refrigerator and when to wash my pump.  As I was in the restroom, I wondered enough is enough.  Should I be offended, would someone else be offended.  Would you like to be called a cow?  Would you like jokes being told about you every time you go pump?  Would you say something?  Do you think this is harrassment?  What if one of the owners is in on the jokes too?  Who do you go to then? 

Breastfeeding my baby is very important to me.  That is why I pump everyday, drink Mother's milk tea to keep producing milk, and even take pills so keep the milk flowing.  I face those kinds challenges everyday, why should I have to put up with this too.  I have 6 more months of this, what to do?  What would you do?