Line progression - scared to miscarry

My mom had multiple miscarriages in 11 years . She was only able to have two kids in that time from , me who's 20 and my sister who's 11 . Before she had me she had a miscarriage and after she had me is when she had many before my sister . She almost lost my sister in her 3rd trimester at age 30 and was on bed rest for 6 weeks . I'm afraid to lose this baby I'm currently pregnant with . I've never been pregnant before . My mom has ovarian cysts and was smoking during , I haven't smoke the whole time we've tried this month including before and after I found out I was pregnant and I don't have ovarian cysts . So now I can't help but to keep taking pregnancy tests until my prenatal appointment 3-5 weeks away , not to track progression but to make sure the hcg doesn't drop . I've wanted this for 2 years and my husband might get denied his visa early next year before the baby's due , I'll be 6-7 months by then . This baby means the world to me . Because my husband does too and this baby is ours . Anyone else feel this way about miscarriage that they keep testing every couple days like me ? I knew from before I ovulated I was pregnant !! Registered nurse said it's possible to get pregnant before ovulation .