Multiple chemical pregnancies ?

I had a true missed miscarriage in april at 6wks. Ever since then in june, and now july i would have positive pregnancy tests around 10-12 dpo and then period 2 days late, then start bleeding. Then preg test goes negative. I know my hcg dropped to neg after the first true miscarriage because i took multiple tests to make sure it went back down to neg. Has this happened to anyone else? I want to inquire in on some other peoples experiences before my husband and I invest and seek a specialist opinion. Im getting very discouraged and am almost wanting to give up. I don’t understand my doctors told me theres nothing wrong with my uterus and ovaries so I should have no problem getting pregnant again.