Folic Acid Question 🤔

So I take 800mcg of Folic Acid every other day. Only just started it last week after I finished my period.

Since 1dpo, I wake up everyday feeling a little nauseated and cramping that lasts all day.

I am on 6dpo, still cramping everyday, as if my period is coming.

I highly doubt that I have conceived as we only had sex once which was one day before Ovulation 😩.

My suspicion is that the supplement is causing me these cramps. Has anyone else had this problem?

I started taking prenatals when I first started ttc but after 6 months I stopped because I was constantly tired, my joints were hurting, headaches, constipation and trouble sleeping. I felt that the prenatals were doing this to me, so I stopped taking them and BAM all my symptoms disappeared.

I am not going to take prenatals until pregnancy occurs, so sticking to Folic Acid but I think all this cramping is due to it.

I tend to Ovulate around CD11-12 on a 28 day cycle 😳.

I have never used Birth Control and have a regular 28 day cycle with no health issues.

Any advice?