Unprotected intercourse with my fiance, period lasted 3 days

It is possible, but unlikely. If your period started 8 April, it suggests you ovulated 25th March, so you are unlikely to have been fertile on 26th, but it is just possible. However, the arrival of your period would indicate that you are not pregnant, though not 100% guaranteed. Was the 3-day period normal? The negative test result is a further indication you are not pregnant, though there can be false-negatives.

I don't think it is likely you are pregnant, but anytime you have sex there is the possibility of pregnancy following. If you test 3 weeks after your last sex, that is likely to produce a reliable result. 27th March + 21 days  = 16 April. So if you tested after 16th (you said last week, but not when), the result should be reliable.

My period wasn't normal it was too quick but I actually took a test before I got my period. Sorry for the mix up. But I will wait to see if my next period comes which is in 2 wks. Thank you

Pleased to help. If you need more help, just ask.

So I was getting ready to go out and I laid back down for a second and I started having these bad adominal pains on my right side and getting nauseous. My ovaries were in serious pain. It's finally starting to subside but I never felt that pain before. My fiance says it might be an etopic pregnancy. Can you enlighten me on this situation plz

An ectopic pregnancy is when a fertilised egg implants elsewhere other than in the womb, usually in one of the fallopian tubes.
Occasionally, an ectopic pregnancy doesn't cause any symptoms that are noticeable, and is only detected during routine pregnancy testing. However, most women do have symptoms, and these are usually evident in weeks 5 and 14 of pregnancy.

You say "My ovaries were in serious pain". But you only have two ovaries, and only one on each side. You only said you had pain on the right side.

Nevertheless, there are other things it might be, including appendicitis which is the swelling of the appendix which causes agonising pain in the lower right-hand side of your abdomen. That would mean your appendix would need to be removed.

Severe abdominal pain is a cause for concern. If it started suddenly and unexpectedly, it should be regarded as a medical emergency, especially as the pain is concentrated in a particular area.

I am not a doctor, and would recommend you see your own doctor to find out what is happening. I doubt it is an ectopic pregnancy, but your doctor would be able to tell you what is wrong, if anything. It might be just trapped wind! I don't want to scare you but, because of the different things it could be, some serious, a medical practitioner is best consulted.a.s.a.p.