Anyone have any ideas?

So my lower stomach has been hurting lately and I've been constipated and idk what to call this feeling....half way between nausea and indigestion? :S last night I was feeling my stomach and I felt a bulge but when I pressed it it disappeared so I'm thinking that was gas. I've had my period and about to start my next period in 10 days. I've been to the doctor and my thyroid is low and she said if it doesn't get better come back and I might get an ultrasound. Any ideas since its Labor Day weekend and I won't get an appointment until Tuesday?