Im on prop only now too EOD at 50mg and I get a nice steady gain but not a bloat and no pain. Im not gaining weight like you probably are but I am certainly not losing weight. Train hard and eat right and you wont need alot.
Try going down to 50mg eod and watch your weight and body measurments, all while eating and training right. Start there, you should still have progress. Also, much less of the gain will be water bloat and fat from test converting to estrogen. Plus, you can always increase. just my 2