Asalamu Alaikum,

I am very sorry to hear that this is happening to you. There are many things that you can do in your situation.

1- You can teach your family why pork is so unhealthy and perhaps persuade them to at least cut back on it themselves.

2- You can have a heart to heart with your family members (perhaps one on one would be easiest) about why they are so opposed to your choices. And you can turn this into a chance to clear the air of any misconceptions or misunderstandings they may have about your choice of Islam and to not eat pork.

3- Don’t assume that they know what pork means. Many people don’t know that pork means any meat that comes from a pig. Explain to them that ham, salami, bacon, etc. are all pork.  

4- Ask if you can prepare or help prepare the food for the family so that you know exactly what is going in it. If you are able to do this, it will be a very good deed for you to nourish your family.

5- If you are not allowed to help out with the cooking, then ask if you can prepare your own food separately, but still eat with your family to keep the bonds of love that breaking bread with people brings.

6- If all else fails, know that Allah only judges us by our intentions. If you have mistakenly eaten pork because someone put it in your food without your knowledge, know that you are not accountable for that. That is not your sin to bear.

I hope this helps. Salam.

Also check out this links for more info:

http://aboutislam.net/reading-islam/living-islam/when-new-to-islam-dont-sweat-the-small-stuff/

http://aboutislam.net/reading-islam/understanding-islam/avoid-eating-pork/

http://aboutislam.net/reading-islam/understanding-islam/pork-forbidden-islam/