New found sex life

So my husband and I have been going a really rough patch since having our son 8 months ago and now I’m pregnant with baby #2. Our sex life has been slim to none ( like 1x a month 🤷🏻‍♀️.) we had a long serious talk about our relationship yesterday and decided it was time to try and be more adventurous in our sex life. With that being said it has 100% worked because we have had sex a total of like 5 times since yesterday. I am so sore! Is this normal?