Muscle relaxants non prescription for pregnant women?

Hey so I’m not sure if I’m pregnant or not but to be safe I don’t want to take anything that could potentially harm a baby, but I have two super nasty knots on my shoulders I havnt been able to get rid of in 4 days.. does anyone know of a muscle relaxant that’s non prescription that’s safe for me to take?

I’m also taking prenatals so again worried about taking something that would mix badly and harm

If anyone knows of one please lemme know ASAP as I have tried EVERYTHING, hot baths with jets, hand held massagers, voltarin, Tylenol…nothing is working

Edit: please stop telling me to just take a test, my question was not if I am pregnant, my question is what is ok to take for pain while pregnant that is non prescription…I suffer from PCOS and struggle deeply in getting pregnant and it’s an extremely stressful process for me to take a test when I’m hoping I am infact pregnant. My partner and I are trying and I am taking prenatals whether I am or not to help kick start something, I am doing everything I can correctly as if I already am pregnant. It may be easy for some to just test and be done with it, but for me it’s disheartening so therefore I don’t like to jump the gun and test at first thought…thank you everyone for your time and advice 🖤