Weight loss, loss of appetite, feeling nauseous.

My fiance is worried, me not so much. So recently I've lost about 30 lbs I'd say sense January maybe. I think it's because of the birth control I went off from just my body re adjusting to no extra hormones. Well sense loosing the weight I've noticed my appetite is gone, I'm rarely hungry and even when I am I can barely eat anything I get a few bites in and I'm either full or start feeling nauseous. So naturally my fiance is freaking out and thinks something is wrong with me. I'm not too worried as I said I think the weight loss is mostly my body re adjusting plus I've been eating healthier. But the nausea has been bothering me. I told my fiance I'd make an appointment soon as in trying to quit smoking I planned on getting the patch anyway so I'll make an appointment for that and I said I'd mention to my dr his concerns. But I figured meantime does anyone else think its alarming or is he over reacting.