Miscarriage symptoms ??

I'm 5w3d. I've been nauseous since about 4 weeks. Two days ago I realized I wasn't nauseated at all, all day. I've had two days of feeling great. Now today I woke up fine, but now feel like I'm getting my period. Not crampy, but my legs hurt and my lower back is slightly achy which is an early period sign for me. I am nauseous this morning, but also totally freaked out that I might be miscarrying, so maybe nauseated from the stress. Idk. What do y'all think? No bleeding