If a blood test and several hpt's have come up negative, chances are you're not pregnant. Blood tests are much more accurate and can detect hcg sooner than hpt's. Unfortunately, PMS symptoms and pregnancy symptoms are very much alike. I wish you all the best.
doesn't sound like you are pregnant, sorry.
If you conceived more than a week ago, then it will be very accurate. If the blood test was performed a day after unprotected intercourse, not accurate at all.
It is very accurate. You are not pregnant. As we discussed before it is not uncommon for IUD side effects to seem like pregnancy side effects.