Nervous to have sex

I went for an ultrasound at 11 weeks 3 days and the doctor said everything looked great, but that there was a small collection in my uterus that should resolve on its own, and to expect spotting. No spotting at all so far and I'm 12 weeks today. My husband and I haven't had sex since we found out I was pregnant because we're both too scared. The doctor said it should be fine, as should lifting (I lift 50 pounds over my head for work as a flight attendant) but I'm still so nervous to lift or have sex! I hadn't really thought about it until today since I have to go back to work in a few days and have been missing that time with my husband a lot more now that I'm feeling a little bit better. Anyone have any experience?