so confused..

I had a chemical misscarage on the 14th of Feb 18 and bleed for only 6 days so we started trying right away. I missed my af on the 14th of march 18 and took a test It come up with a faint line and I took another 2days later still a faint line the next week took 2 more and come back the same then done another and it one the week after and line come up a bit darker, I have had sore boobs and slight headaches and bloating always wanting to sleep, because if what happened in February I keep testing yesterday a faint line and today it come back negative still slight sore boobs and bad headache all day with a bit of a blur vision even had a nap last 2 days also had a lot of whit discharge in my underwear.. I really don't know what to do or think.. has anyone had this and still been pregnant? still not had any bleeding or pains * update I have just started to bleed so now the misscarage has started.. I am so up set this is now the 2nd one and can't understand why I get pregnant right away but baby's are not sticking :( and all the doctor says is it's chemical misscarage. this is now my 4th pregancy lost my son at 20 weeks 2010 and then got pregnant right away had had my beautiful daughter now 7years, and now the 2 early misscarages.