TTC and confused about if I'm pregnant or not?

My husband and I are TTC and I need a little advice because I'm just confused and frustrated at this point.

I have been on the same birth control pill for about two years and I was put on it because I randomly stopped having a period for three months. The doctor couldn't figure it out but attributed it to my weigh because I'm so small, however I was the same weight I'e always been. Anyways, while I was on the birth control for two years I had a normal period every month.

I recently stopped taking my birth control in late February/early March because my husband and I decided we wanted to conceive. My doctor told me that it was safe to begin trying a month after I stopped my birth control pills. The first two months off of my pill I had a normal period.

In May I missed my period. I had a light brown discharge (not even enough for a pantyliner) the first two days of when my period was due but that was it. I tested when I was 8 and 10 days late and they were both negative and then I retested, with a different brand of test, when I was about three weeks late and it was still negative.

Around the three week mark of being late for my period I had tender/sore breasts but that only lasted about 3 days and went away. I haven't had any other signs or symptoms that I was pregnant or that my period was coming. I should have my next period on June 5th and I have no signs like I normally do that its on its way.

I honestly don't know what to do. I plan to retest on June 5th if my period doesn't come, but if its still negative should I go to the doctor? I don't currently have insurance and don't want to pay for a blood test if I'm not even getting a positive result on a home pregnancy test. I don't even know if my doctor would do a blood test because she wouldn't when I was three months late a few years back because the tests I took at home were all negative.