Congratulations on getting past your initial sexual experiences and move on to healthy adult relationships - unfortunately trust is an issue that affects everybody: protect yourself as best you can, protect yourself against unwanted pregnancy and std's first and formost, it might help you relax and enjoy yourself in that department - but realize that not every relationship is going to work out, very few do the first time, and trust issues are universal.

Still, you may, and probobly will, have more than most, and it may take time to resolve them - there are those out there who empathize with your situation, so just do the best you can. Seek profesional help if it becomes overwhelming, and there may be incest survivor groups in your area.

Try not to get too deep into a victim mindset, however tempting: what happened to you sucks, but it needn't define you or your adult relationships - easier to say than to do, but you strike me as a strong person who has already realized this.