should I go to l&d

Okay so since about 1230 last night my thighs have been really sore and my stomach is really tight and sore like as if I worked out my lower back is killing me feels like someone is pinching it I've threw up twice this morning I'm not nauseous or anything it's just every time I stand up I get this weird sensation that I need to throw up. I called my doctor they told me just to take a Tylenol and a hot bath and if it doesn't go away to going to labor and delivery I'm 36 weeks pregnant. I don't want to take any Tylenol I haven't took any medicine my entire pregnancy and I know hot bath isn't going to help.