Helppp

So about 2 weeks ago I took the dip stick dollar store pregnancy test one at night which was vvf and one the next morning after not having my period for a month I followed with clear blue and all were negative… like a week later I tried 2 dollar store purple and white text and to me looked negative today I took the last dollar ( purple and white ) test and got 2 lines but still faint but color in it what is going on I contacted ob I told her about false positives but I was told because there were 2 positives I most likely am or was pregnant and wants me to get blood work I just think it’s weird I got positives negatives and a positive again 2 weeks later