2 first response faint positive 2 other test negative
My first tip is to post a photo of your positive tests here for us to see so we can help better!
A positive is a positive. It doesn't matter if the line is faint, a second line is a positive result as long as that second line is in the right place and is the right color. If you have two faint positives I think it is safe to say you are pregnant. Only count positive results that show up in the allotted time period. The later negative tests could be a result of diluted urine. Wait and don't test again until the next morning with your first morning urine since it will be the most concentrated and have the highest amount of the pregnancy hormone in it.