HELP! Lost all interest in intimacy! 😭

First I want to say that through this whole thing my husband has been nothing BUT SUPPORTIVE, and loving to my needs.❤️❤️❤️

I have been with my husband for 5 years, married 3 years out of the five. Our daughter is 4 and our son is 2 1/2. Before we found out I was pregnant with our girl we had sex on a daily basis, while pregnant i had morning sickness literally 24/7 for the entire 9 months. So sex was pretty nonexistent. After her birth and my 6 weeks post, I was TERRIFIED of getting pregnant again and being so sick. We used condoms but my interest was pretty low. My husband went out of town for a week and when he got home we conceived our son 😁 during that pregnancy i had morning sickness the entire pregnancy but not 24/7 like i did with my daughter. But during my sons pregnancy i lost all interest in sex. I have been working from home for 10 months, so by the end of my 8-10 hours working day/stay at home mommy, and doing our evening routine. I am ready to call it a day and SLEEP. We are only have sex 2-4 times a month but even those times i am not REALLY in the mood but i love my husband and want him to know that i care about his feelings and his wants as much as he cares about mine.

My question is, should i see a doctor? Is it a mind over matter thing and see a counselors/therapist? there anything organic I could do to help this? A Vitamin? I am open to any suggestions!!! Thank you!!!