I had unprotected sex almost 4 weeks ago. I didn't think anything of it because we used the pull out method. A few days after that my breasts became more sore and I got what I thought was my period but I was worried because it was too light to be my period. It lasted for about a week and a half. During that time I took 3 pregnancy tests and they all came out negative. My bleeding stopped and my boobs became less sore, but a week passed and I got my period again only this time it's a bit heavier. I have cramps almost every day and my breasts are sore again but the soreness moves around from day to day. I have irregular periods to begin with but this is just way too confusing. Someone please help

You had unprotected sex and used a birth control method that is a joke and the most unreliable form of birth control there is. It's possible you're pregnant. Too early for symptoms though. You need to wait until you miss a period and then test 2 weeks after that. Testing too soon will not give you accurate results.

I had unprotected sex 4 weeks ago but got a light period (or so I thought) a few days after. I took 3 pregnancy tests during that time and they all came out negative. This period lasted for a week and a half. A week passed and I got my period again but this time my breasts hurt and I have cramps almost every day. Could this just be my period or should I be worried about being pregnant? My period is irregular to begin with.

The first symptom of pregnancy is a missed period. Most likely you are not pregnant. You need to wait to see what happens with your next period. If you miss it, wait two weeks then test using first morning urine.