Nervous about sex...

Allison • Married 3/16/13 to my college sweetheart. We have one wild boy born 2/4/15 and expecting baby #2!
My husband and I are pregnant w baby #1! I'm almost 6 weeks. We lost a pregnancy in February and it was a very early pregnancy, maybe 4 weeks along. So I'm super paranoid about sex this early. I'm afraid that things will "shake loose"....I'm just really anxious about it. Anyone have a similar experience? Similar anxieties?? Any feedback or advice welcome!!