Weird period past two months

Sarah • Wife 8/31/18 and mother to a perfect little girl 5/31/2017 and little boy 10/4/2019. Pregnant with our 3rd Due September 2021. We were expecting twins but lost baby B early on.
I have been on the pill for 9 years. Last month my period came two days early which never happens. It was light and last two days. A week after I become ill, super dizzy, nauseous with weird cramping on my right side. Sometime I have "hiccup" days were I don't bleed the it starts up again but it never did. I've taken 2 HPT both negative. I've miss a few pill this month. But Its never effected me like this. I had spotting for an hour on Sunday. Then the same Monday morning just spotting then nothing at the end of the day. Tuesday nothing. Now it's Wednesday and nothing still. This is my last month on the pill then my SO and I are going to try and have a baby! Just hoping my body is ok. Anyone have had the same thing happen??